QUICK NOTE BEFORE WE GET STARTED: The following story has me attempt to get both Marvel's Nova Corps lore and DC's Green Lantern lore correct. Which is a lot of lore. So if I get any incorrect (namely Nova Corps information because I'm mostly familiar with the GLs) please bear with me. But if I do, consider that this is an AU/crossover so take it with grain. Thank you.
As per Nova shenanigans, zooming around the asteroid belt never gets old. He was on his way to Knowhere to catch up with Cosmo the talking Russian astronaut dog. Being a space-faring superhero has its strangely awesome perks. Except when your space-faring superhero father straight up disappears.
The thought of Jesse Alexander reminds Sam of what he's doing out here: to look for him. Well, that and figure out how his helmet works. He had spoken to the Worldmind about it, but he had yet to dabble more into his power levels. The Worldmind itself was Richard Rider, the last of the Novas other than Sam himself. Being connected to the minds of all the fallen Novas made Richard extraordinarily powerful. As a matter of fact, Sam wondered what happened to Richard Rider.
"S'pose I'll find out some other day." he says aloud, setting foot on Knowhere.
He looks around for Cosmo, who was head of security here in Knowhere so if there was any commotion Cosmo would probably be there. And as if on cue, an alien runs by being shouted at for being a thief.
"Welp." Sam cracks his knuckles and stretches, "Didn't expect to be kicking butt so soon but here we are."
He simply aims a blast of Nova energy at the alien's feet which caused him to fall forward. On the ground, the alien doesn't move, possibly rendered unconscious when his face hit the ground. Quite an easy feat, considering what Sam has faced in the past. He flies over to see what this guy has stolen just as Cosmo finds his way over here.
"Comrade Alexander! It is nice to be seeink you!" the dog exclaims with his accent. Cosmo was telepathic, so every word he speaks was projected into the listener's mind.
"Hey Cosmo, what's up?" Sam greets, giving Cosmo a nice scratch behind the ears. Cosmo wags his tail happily, "Cosmo was chasink the thief but luckily you came along my friend!" he barks.
Sam nods, and waves his hand in a dismissive motion. "It was no biggie, I just made the guy fall. Besides, what was he stealing anyway? I don't see anything."
Cosmo sniffs around the fallen alien, and points at the alien's fist with his nose. "There is somethink he clutches in his fist. It glows a green color. Cosmo wonder if it is mint flavored."
Curious, Sam goes over and investigates. Indeed, whatever the alien was holding was emitting a green light, making muffled noises like it was talking. "Let's see what this baby is, shall we?" Sam briefly looks over at Cosmo who barks his confirmation. He starts to pry open the alien's fist but before he even got far, the little green object shoots out. Once in view it becomes clear that this object is a ring of some sort. Now Sam and Cosmo could clearly hear what it was saying.
ɢʀᴇᴇɴ ʟᴀɴᴛᴇʀɴ ᴏғ sᴇᴄᴛᴏʀ- ℮ґґ◎ґ. sᴇᴄᴛᴏʀ ᴜɴᴋɴᴏᴡɴ. ʟᴏᴏᴋɪɴɢ ғᴏʀ sᴜɪᴛᴀʙʟᴇ ʀᴇᴘʟᴀᴄᴇᴍᴇɴᴛ.
Cosmo cocks his head and pants. "Interestink. Cosmo never seen this before."
"Yeah…" Sam cocks his head similarly. "I agree- I wonder if the Guardians know what this is. Maybe we should ask them about it."
The green ring floats around them in circles, making calculations. It repeats the same words, "ʟᴏᴏᴋɪɴɢ ғᴏʀ sᴜɪᴛᴀʙʟᴇ ʀᴇᴘʟᴀᴄᴇᴍᴇɴᴛ" as if it was scanning all the people on Knowhere at the same time. Cosmo watches it with curiosity, wiggling his nose at it. "Cosmo wonder who ring will be choosink."
"Yeah-" Sam starts but he never got to finish as the ring finds its answer, the potential wielder was right there all along.
sᴀᴍ ᴀʟᴇxᴀɴᴅᴇʀ ᴏғ ᴇᴀʀᴛʜ-616 ʏᴏᴜ ʜᴀᴠᴇ ᴘᴏᴡᴇʀ ᴛᴏ ᴏᴠᴇʀᴄᴏᴍᴇ ɢʀᴇᴀᴛ ғᴇᴀʀ.
The ring floats steadily in front of Sam before slipping itself onto his right middle finger. The surge of willpower sparks a bright light in Sam's vision, blocking out all of his senses. With the black ops Nova helmet and the ring's powers combined, it caused some sort of chain reaction.
ᴡᴇʟᴄᴏᴍᴇ ᴛᴏ ᴛʜᴇ ɢʀᴇᴇɴ ʟᴀɴᴛᴇʀɴ ᴄᴏʀᴘs.
Sam could barely hear the last words, nor he could hear Cosmo's barks of concern. All he heard was a ringing in his ears, and all he saw was a brand new life flash before him. He wanted to call out for his mom, or reach out for his sister but soon their names were forgotten. Not even his father he could remember.
At first, Sam just saw flashes of them. The Green Lantern Corps and its various members, he got to see glimpses of the other corps and then his new life began.
"Welcome to the world Samuel Martin Jordan." he heard his mother say in the flash forward. But this wasn't his real mother, this was someone else. His new mother was fair skinned with charcoal colored hair. Then his saw his new father, brown hair, aviator jacket.
Each of them wore a ring, his new mother's violet, and his new father's green.
Sam wanted to ask what was happening, but his mouth was dry and the life before his zoomed forward in time.
Now he was a toddler, playing with toy planes in the yard while his parents looked on with pride. Their hearts glowed with their love for eachother, and yet something was wrong. His father had to leave to space, leaving his mother to watch over Sam.
Th-this isn't my family. He thought, although just as the words formed in his head, they were taken away as he was forced to watch.
The vision cuts to Sam as a kid, getting a surprise birthday gift from his dad as he comes home. His father opens up a large box, waiting to see Sam's reaction as a puppy jumps out and licked his face.
The phenomenon continues, cutting to various points in his life, removing all of Sam's memories on Earth-616 before being trusted into this new reality right where it left off.
No more was he Sam Alexander, now he was Sam Jordan, son of the greatest Green Lantern who ever lived.