Disclaimer: All rights go to the Avengers characters belong to Marvel and all Danny Phantom characters belong to Nickelodeon/Butch Hartman. This story is for fun; not money or profit of any kind. The author owns nothing.

Avenger's Ghost

By Goliath101

Prologue

They had done it. Catastrophe had been avoided. The Dis-asteroid had passed harmlessly through the Earth, thanks to the 14 year old half-ghost hero, Danny Phantom, and the denizens of the Ghost Zone, a parallel dimension home to every ghost. Though, it hadn't been easy for Danny to convince every ghost, so many of whom were his enemies, to help. Even harder to convince were the governments of the world, particularly leaders of small, isolated countries like Latveria. Especially after Vlad Plasmius, Danny's arch-enemy, had all but strong-armed the world into submission, for however brief a time.

But despite the hard work, it all paid off. The world was safe, Danny was a hero to the world, and it was time for new beginnings. Starting off with his new girlfriend and long-time best friend, Sam Manson. As the two flew over the new statue honoring Danny, Sam said, "Nice statue. Personally, I would've used recycled materials, but that's just me." Danny could only chuckle contentedly as the pair flew off into the moonlight.

Later that evening, after dropping Sam off at her house, Danny returned home. Before entering the house itself, Danny decided to pop into the Emergency Ops center, on the roof. The absurdly large structure was shaped like a UFO, and always made Danny laugh. Or cringe in embarrassment, depending on the situation. Danny phased through the wall to find all the lights off. On edge, Danny moved to turn the lights on. He flipped the switch; nothing. Danny frowned. 'Normally, Mom wouldn't let the lights be out this long,' Danny thought. 'Dad, maybe, but...'

"Welcome home, Mister Fenton," came a deep voice behind Danny. He spun around to find a dark skinned man dressed all in black with an eye patch over his left eye. "Or, do you prefer Danny Phantom? That was a bold move, revealing your identity to the world."

Danny's eyes and fists began glowing, lighting the room in an un-earthly green glow. "Who are you," he growled. "And what do you want?"

The man raised an amused brow. "Sorry, son, but we haven't been... properly introduced," he stated, making no move. "I'm Colonel Nick Fury. Director of SHIELD."

Danny paused, and lowered his fists, slightly. "SHIELD? What's that?"

The man named Fury smirked. "I assure you, Phantom, I'm not here to fight. I'm here to talk to you about saving the world."

Danny was even more lost. "Save the world? Uh, dude, where have you been the last few days? The world is already saved. And you still haven't answered my other questions: Why are you here, and what is SHIELD?"

"The Strategic, Homeland, Intervention, Enforcement and Logistics Division," came an unexpected, and feminine voice from seemingly out of nowhere. At the sound of the voice, Danny nearly leaped out of his jumpsuit. As he collected himself, a red haired woman in a tight, black jumpsuit walked out of the shadows. On her wrists were two unusual bracelets that made Danny think of the Fenton wrist-rays. On her waist was strapped two matching pistols. He glanced over to Fury, who was smirking at Danny's reaction as the woman took her place at Fury's side. 'A body-guard?' Danny thought. 'and a pretty one, at that.' Just at looking at her, Danny could see she was sizing him up as a potential threat. Her intense glare caused him to shift nervously.

"Danny, I'd like you to meet one of my top field agents, Natasha Romanoff, also known as the Black Widow," Fury explained, crossing his arms.

"Huh, nice to meet you, I guess," Danny said slowly.

Romanoff just nodded. "I apologize for the entrance," she said softly. "But Director Fury enjoys drama a bit too much at times."

Fury shot Romanoff a warning glance. "Anyway," he said. "We are here to thank you in person for coming up with the world saving idea of turning the Earth intangible. I don't think even Stark could have come up with that. But now that the world is at peace, for the moment, I'd like to look ahead to the horizon. We, at SHIELD, are putting a team together."

"A team?" Danny said confused.

"Yes, a group of... remarkable people, to fight the battles that no single hero could," Fury nodded to Romanoff, who stepped forward with a sealed file.

"For your eyes only," she said warningly. "That means no sharing with your goth girlfriend, Sam, or your other friend, the mayor, Foley." Danny's other best friend, Tucker Foley, had been named mayor of Amity Park after the Dis-asteroid incident. He was also the youngest mayor in the city's history. "Or your sisters, Jazz and Danielle," Agent Romanoff continued. "Or your parents."

Danny's eyes widened at how much they knew. 'They know about Danielle?' he thought worriedly. Danielle, or Dani, was female a clone of Danny. After saving the world and revealing his identity to the world, Danny's family found out about Dani and adopted her as their own.

Before he could say anything, Fury stepped forward to clarify. "For the time being. We would like this to remain a secret, the rest of the team has not been fully assembled yet, so there is no need to make it public. We have been watching you for some time. We know your one of the good guys. If you think this might be a trick by the G.I.W., don't worry, you and your family are under S.H.I.E.L.D. protection now. And we will discuss this with your parents at a later date."

"Other heroes, huh?" Danny thought the matter over. These two were intimidating, but somehow Danny felt he could trust them. They were actually willing to talk to him, rather than shoot at him, like the G.I.W. "I didn't know there were any other superheroes in the world."

Fury grinned. "You think your the only one? No, no, no, you've become part of a bigger universe. You just don't know it yet." With that, Fury held out his hand. Danny took his hand, grinning at the prospect of working with other super heroes. "Danny Phantom, welcome to the Avenger Initiative."

Colonel Fury and Agent Romanoff turned to leave, but Danny said, "Wait, the world isn't in danger, so what is this team for?"

Fury looked over his shoulder and said, "If, and when, the time comes, you'll find out" With that, the two secret agents left, leaving Danny alone with his thoughts.

Danny phased through the roof to check the house. His family were all in living room, talking excitedly, fawning over Danielle, much to her joy. They were so wrapped up in having a new family member, they never knew the two secret agents were in the Ops center. Danny decided it was best not to question how they got in. After telling his family goodnight, Danny sat in his room, reading through the files on the Avengers Initiative. Aside from Danny, there were only two other files on full fledged members: Another field agent named Clint Barton, alias "Hawkeye". According to the file, he was the best shot in the world, his weapon of choice was a bow and arrow, but he was highly skilled in other weapons, as well as hand-to-hand combat. A loyal and dedicated agent, if there ever were one.

The other file was the red haired woman he had met earlier, Natasha Romanoff, alias "Black Widow". The two agents had apparently worked together before, as Danny looked through several pictures and video files of the two in combat. A superb spy, she was listed as the most skilled hand-to-hand combatant in the world, trained in virtually every form of weapon, from guns to knives, anything that kills. She was a master of disguise, fluent in multiple languages, had computer hacking skills, and was a master detective. 'Whoa,' Danny thought. 'She's like James Bond, Rambo, and Sam all in one.' Danny decided he'd best not cross her if he ever worked with her. His own file was similarly detailed as the two agents, with comprehensive lists of his powers.

Other files were mere lists of potential candidates that had either not been decided on, or listed as 'Not enough info.' Some of the names listed were vigilante's he had read about in the news, like Moon Knight and Daredevil. Since no one had ever gotten clear pictures or video of these two, he had never thought of them as superheroes. Another name he did recognize was the infamous Punisher, Frank Castle. Written next to his name in bold print was 'NOT A SUITABLE CANDIDATE.' Other names on the list Danny did not recognize were Dr Stephen Strange, Wolverine and Ghost Rider. 'Ghost Rider? Why have I never heard of him before?' Danny thought. He rubbed his eyes tiredly, exhausted after the last few days. Thankfully, his enemies in the Ghost Zone were equally tired, so hopefully, he could get a full nights sleep.

CHAPTER 1: SOME ASSEMBLY REQUIRED

A little over a year had passed since Danny encountered Nick Fury and Black Widow. In that time, the world had started to change. Billionaire Tony Stark had become a hero called Iron Man. Dr Bruce Banner, a.k.a., the Incredible Hulk had caused some havoc with the military, broke part of New York, and saved the city from a creature called The Abomination. He had since disappeared. Then, in New Mexico, Norse myth was discovered to be real, when Thor had a death match with a big robot. These three people had all been added to the Avengers Initiative. Danny had learned of this roster change from a S.H.I.E.L.D. agent named Phil Coulson. Coulson's visits had been short, but the man was kind and his demeanor put Danny at ease. The most startling addition was the original superhero, Captain America, had survived WWII after being frozen in ice for over 70 years! Coulson was particularly excited about this, which was amusing. But Coulson had that said since the world was relatively safe, the Avengers were not needed at the moment.

Danny didn't complain. He was enjoying his life. He was popular, people, (his parents in particular), were no longer shooting at him, he had the girl of his dreams, and his best friend was mayor! Danny, himself, however, hadn't changed much, however, despite being a year older, and the natural growth that came with it. He flew off toward home after a relatively quiet night of patrol. Summer vacation had officially started, and Danny was allowed to stay out late, being a famous superhero, and all. Danielle, however, still had a curfew, something that she hated. Danny chuckled sadly. He had been patrolling alone for the past few nights. Sam was out of the country for a month with her family, Valerie was also out of town, and Tucker had a lot to do, running the town, so he was beat. Danny had a feeling something big was going to happen, sooner or later. Clockwork had told him to stay prepared. For what, he wouldn't say.

As he flew towards home, his phone rang. The number was the special S.H.I.E.L.D. number Coulson had provided. "Uh, hello?" Danny asked.

"Danny, it's Agent Coulson," came the reply. "We need you. Director Fury wants everyone on board. The world is in extreme danger. I need you to meet me at the local airfield, pronto."

Danny was taken aback. "Is this a joke?"

"I'm sorry, Danny, I know this is sudden, but it is very real," Coulson replied grimly. "Your parents have been notified."

Danny sighed. "Alright, I'm on my way."

Danny soon landed at the airstrip to see Coulson waiting outside a sleek looking Quinjet. "Hey, Coulson, sweet ride!"

Despite the situation they were facing, the boy's positive attitude toward everything was refreshing. "Thanks," Coulson nodded. "Now if your ready, we have one more stop to make in New York."

"New York?" Danny asked. "What do we need there?"

Coulson smiled. "Another of the Avengers need some... convincing."

Danny nodded and sat down. "So if the Avengers are assembling, where are Black Widow and Hawkeye?"

Coulson sighed. "Barton's been... compromised," he answered carefully. "An Asgardian named Loki is planning on invading the Earth. He somehow took control over Barton's mind with his staff, as well as several other people, including a scientist named Erik Selvig."

Danny did not like the sound of that. He knew first hand what it was like to have some maniac control your mind with a staff. "Why them?" he asked.

"They were studying a cube shaped artifact of immense power called the Tesseract, and now Loki wants it for Heaven knows what," Coulson replied. "And the answer to your other question is Agent Romanoff is busy finding Dr Banner. We could use his help to find the Tesseract."

Danny nodded taking the information in. The two sat in silence for some time. As they arrived in New York in record time, Coulson said, "Danny, I'd like you to wait here while I fetch Stark. Another member of the Avengers is on his way here to join us as well: Captain Rogers."

Danny was stunned. "I get to meet Captain America right now? Awesome!"

"I know, right?" Agent Coulson replied as he headed for the ramp, a grin on his face.

Some time had passed, and Danny was bored out of his mind waiting. It was nearing dawn. Soon he heard the engine of a motorcycle puling up outside the Quinjet. Danny looked out to see a blonde man in regular clothes holding a file similar to Danny's, looking at the aircraft uncertainly. "Um, can I help you?" Danny asked as he floated down the ramp. The man looked shocked to see the white haired kid floating in front of him.

"Uhh... Captain Rogers reporting," he said slowly. "Am in the right place?"

Danny was floored. He hadn't recognized the Captain in regular clothes. "Oh, uh, YES! I mean, uh, you sure are, Captain Rogers!" he stammered awkwardly, trying to sound professional and hide his excitement. Steve looked at the boy uncertainly, not sure what to make of the kid with glowing green eyes and white hair who was floating in front of him.

"Are you... Phantom?" Rogers asked.

Danny grinned. "Yes, sir!" He held out his hand to the hero. Steve shook it slowly, noting how cold the boys hand was.

"Uh, kid, could you not... float?" he asked, not wanting to offend the ghost, but the sight of someone flying without wings or a plane was somewhat unnerving. He still had yet to fully adjust to the modern world. Honestly, he rarely left his apartment that Director Fury had provided.

Danny looked down at himself. "Oh, uh, right, sorry," he replied, slightly embarrassed. Two white rings appeared around his waist and traveled up his body, leaving the black haired, blue eyed 15 year old Danny Fenton in Phantom's place.

Rogers eyes widened and he took a couple steps back. "Does that happen often?" he asked bewildered. He had read the file on Phantom Fury had given him, but he didn't realize he was only a kid!

"Whenever I want," Danny replied, finally remembering that Steven Rogers was a man from WWII, and hadn't fully grasped the modern age. "It's a long story. I'll tell you when the world isn't in danger. We better get on board. Agent Coulson will be back soon!"

Captain Rogers nodded, numbly. He was disgusted that Director Fury had recruited a teenager for such a dangerous job. He would be sure to tell him off later. But he knew it wasn't the boy's fault. He was blessed, (cursed?), with powers, and just wanted to help people. Still, Rogers promised himself to look after the kid.

A short while later, the sun had just risen, and Coulson finally made it back to the Quinjet. As he walked up the ramp, he noticed Danny had changed back to his human self, and sitting across from him was his hero. More like Idol... Captain America himself! Though his training as an agent helped him keep it hidden, inside he was jumping for joy like a little kid. He nodded at the two as he leaned into the cockpit, ordering the pilot to take off and head for base. Danny noticed Coulson was alone, and asked, "I thought you were getting someone?"

Coulson nodded, "I was. Tony Stark prefers to make his own way. He'll join us when he's ready, on his own time."

Steve snorted. Just like Howard, Tony's father. A real playboy, or so he had gathered from the news. He went back to reading his files on the others on the team. The rest of the flight went smoothly, except when Coulson had finally lost his nerve and began telling the Captain how he had been watching him while he slept after thawing out, or rather, watching over him. Rogers looked uncomfortable, but Danny could barely keep himself from laughing.

The pilot announced they were landing. Danny looked out, seeing they were approaching a large aircraft carrier. Upon landing, the trio were met by Natasha Romanoff, still wearing her everyday clothes, indicating she had only arrived recently herself. She informed Coulson that Fury wanted to see him on the bridge, and he bid the others farewell. Danny and Steve were looking around the flight deck. Natasha walked up to the two, nodding at Danny. "This must all be new to you," Danny commented.

Steve looked around at soldiers marching in formation. "No, actually this is kinda familiar."

Natasha crossed her arms and said, "There was quite the buzz around here, finding you in the ice. I thought Coulson was going to swoon. Did he ask you to sign his trading cards yet?"

Steve looked mortified as he asked, "Trading cards?"

Natasha nodded, and replied, "They're vintage. He's very proud."

Danny then remembered something his dad told him. "Oh, hey! My dad has a set of those! Maybe you could sign his, too! When all this is over, of course."

Steve rubbed his eyes in humiliation, and then he noticed a man who looked entirely out of place on the flight deck. A man wearing a simple purple shirt and glasses, acting very lost, trying not to bump into anyone. The trio walked up to him and Steve said, "Dr. Banner?"

Banner nodded and chuckled. "Uh, yeah, hi. They told me you'd be coming."

Steve wasted no time getting to the point. "Word is you can find the cube."

Banner sighed, "Is that the only word?"

"Only word I care about," Steve replied sternly.

Banner glanced at Danny, who smiled and held out his hand. "Danny Phantom, huh? Nice to meet you," Banner said. "Impressive work on calculating the whole asteroid thing." Danny beamed at the compliment.

"Would it surprise you to know I was friends with your dad in high school?" Banner asked.

Danny gaped at the scientist. "Your kidding!"

Banner shook his head. "Yup. Your dad was quite the character, constantly rambling on about ghosts and the paranormal. He had some great equations, though. After graduation, we both got accepted to different colleges and fell out of contact. By the way, did he ever get that 'Ghost Portal' thing working?"

Before Danny could answer, Natasha walked up and said, "Sorry to interrupt, gentlemen, but would you care to step inside? It's about to get hard to breathe on a moment."

"Why, is this a submarine?" Steve asked.

"Really, they want me inside a submerged, pressurized metal container," Banner commented. They walked over to the edge and realized they were looking at a propeller. A really, really big propeller. "Oh, no, this is much worse," Banner joked.

Danny was awe-struck. "This is so cool! I wish Sam and Tucker could see this!"

So what do you guys think? This is my first ever story! I am a huge Avengers and Danny Phantom fan! Please, no flames or vulgar language! Those will be deleted and blocked.