Year, 2017. Aboard The Fugitoid's Spaceship

Planet Earth

"I am proud of you all." The Fugitoid told a group of heroes who had helped the turtles in their quest to stop the Kraang. These were turtles' 80s counterparts, Renet, Usagi, and The Utrom High Council.

While the turtles fought at their absolute might on the frontline, these heroes worked tirelessly behind the scenes in order to evacuate as many civilians as possible in case that the Mutagen Bomb detonated on the entire planet.

"I can't believe that we managed to evacuate so many innocent people in such a short amount of time." 80s Leonardo remarked as he brushed off some of the sweat which had taken him over from the strenuous and never-ending hard-work.

"Indeed, it has been a great service to an honourable cause." Usagi added.

"We may have made significant progress, but now is not the time to talk." The Utrom Queen said in response to the group. "The Mutagen Bomb may go off at any…"

Before she could finish, a huge explosion occurred before the group's every eyes. Fugitoid, being the quick thinking fellow he was, immediately accelerated the Ulixes to travel at light speed and escape from the Blast radius of the Mutagen. It was not long before the entire ship was safely above the Mutated Planet, in the middle of space, but just barely.

"No. It can't be." Fugitoid said in a tone of sadness as he looked down upon the Planet Earth, now covered in Green Slime. "The turtles are still down there."

"We have to go back and save our buds!" 80s Michelangelo said to the robotic scientist, not wanting to abandon his friends at any cost.

"We can't Michelangelo, its too dangerous. There's no telling what that Unstable Mutagen might do to us." Fugitoid said in response as he stood and watched the planet from afar, his robotic head bent down in shame. "I failed, and I can't even travel back in the past to change things this time."

However, Fugitoid then felt someone lay a hand on his shoulder. It was none other than Renet, whom had a look of optimism and hope on her face.

"Fugitoid, I know how you feel." Renet said to the Robotic Scientist, consoling him. "I know we can't change the past, but I know the future. The turtles are gonna be okay, and when this planet becomes safe to inhabit, we will get to meet them again."

"How long will it take for this planet to even become hospitable again?" Usagi asked Renet.

"Approximately 50 years, but the turtles will survive." Renet said in response to him.

"I wonder how such a thing is possible." Fugitoid said, still not fully feeling convinced after what he saw.

"Hey Bud, these are the Teenage Mutant Ninja Turtles we're talking about." 80s Raphael said in response to him. "They can make it outta any situation."

"Just ask us, we're turtles too." 80s Donatello added, improving the mood of the spaceship's inhabitants.

"I guess you're right." Fugitoid said, feeling a little better after having everyone's support. "It may take 50 years, but I believe you. I just hope they can make it through that time without experiencing too much suffering."

"That's the Spirit, Fugitoid." Renet said with a smile on her face as she hugged him.

All the others joined into the hug, and held it for a while.

"So, what now?" One of the members of the Utrom High Council asked.

"We do what we do best." 80s Leonardo said in response with an inspired look on his face. "There are many of the people we evacuated away from the earth, probably needing our help at this very moment. We will do whats right and help them with a healthy dose of Turtle Power."

Everyone looked at each other and nodded in agreement. They had work to do before they could all return to their respective homeworlds.

Meanwhile back on earth

The turtles saw the Mutagen bomb go off right before their very eyes. It was a shocking sight indeed, but there was little time to react, as Leonardo pushed his brothers away from the bomb, while taking much of the impact to the face himself.

The other turtles saw almost none of this, as the sheer scale of the explosion blinded their very eyes.

"Leo, Mikey!" Raphael exclaimed with the utmost desperation in his voice as he could only witness his separation from his two other brothers for a split second. However, Donatello was still by his side, albeit still crippled and unable to speak from having his body badly damaged from the previous battle with Kraang Prime. The terrible impact of the explosion only made things worse, making Donatello almost look like a living corpse.

Raphael grabbed onto his brother, for it was the only sense of familiarity he could experience in world that was still blinded by light, slowly but surely breaking down from all the Mutagen that polluted the entire landscape.

"The lair, we have to get to the lair." Raphael said, barely walking with a limp as he attempted to carry Donatello towards the nearest manhole cover.

It wasn't long one before he could feel one beneath his feet, and the blind turtle immediately began to feel the structure with his hands, trying to get a grip on it. It was covered in a muddy pool of unstable Mutagen that poisoned anyone who touched it, but Raphael didn't have much choice at this point. He had to save his brother at any cost.

Carrying Donatello in his arms, Raphael made his way through the sewers as fast as he could. Since the Sewers were one of the last places not blinded by light and covered in poisonous Mutagen, Raphael's vision slowly but surely came back.

Fortunately enough, he was able to locate the lair just in time. Almost having collapsed from carrying Donatello all the way, Raphael finally laid him down in a comfortable spot in the laboratory, next to what was going to become his next body, Metal head 2.0.

Raphael didn't know much about technology, but he knew just enough about the instructions that Donatello had given him and the turtles, in case of his natural body being destroyed. He attached all the appropriate wires around the unconscious turtle's brain which all connected to the robotic body, and waited.

The process of Donatello's consciousness being transferred onto Metalhead was slowly and arduous. Weeks passed by, and Raphael managed to just get by using the spare food that had been stored in the lair just for a situation like this. He fed his brother too to the best of abilities, hoping everyday that the transfer would not fail to complete, and not leaving sight of Donatello for even a moment.

Then, one day

Raphael woke up inside the lair.

But this time, it wasn't of his own accord.

"Raphael, wake up!" Donatello said as he gently nudged his brother.

"Donnie!" Raphael eargerly said in response, eagerly hugging his brother. Only then, he realized that he wasn't hugging his brother's natural body, but rather Metalhead 2.0.

"We don't have much time, all food supplies in the lair have run out." Donatello said to him.

"But where?" Raphael asked. "This is our only home, there's no telling what the world out there is like now. I honestly don't want to know myself."

"Maybe not." Donatello said in response. "But we have to leave if we're going to survive. It's the only way we'll have a finding Leo and Mikey."

"You're right." Raphael said as he then wasted no time in gathering what the two needed to survive out there.

The two brothers also managed to gather some items of sentimental value in addition to the essentials, from Casey's skull, to April O'Neil's broken Tessen which were recovered in the aftermath of the battle with Shinigami.

They then got inside the Shell-Raiser, making their way to the surface of New York City for the first time in weeks since the Mutagen Bomb went off.

Only, there was no city, no buildings, and no people.

"Things will be okay in the end." Raphael said to himself, as well as his brother.

"I promise to never leave your side." Donatello said in response, staying close to his brother as they observed the strange surroundings.

Even though they once used to step foot here, this was a foreign land to him. Nevertheless, the two turtles continued their journey, determined to survive and find their brothers.