This didn't really seem to come to pass. He possesses Jack Noir but gains nothing resembling the features he did in the process. Jack is a chess man with a hard carapace shell, not nearly bishonen enough to pass for something similar to this drawing. Caliborn, though he draws fairly crappily, still maintains some of the essence of the characters he was expressing like Dave, Karkat, and even Davepeta. So then, who is this? LE dies when AltCalliope eats his body and there is absolutely totally no way he can come back, right?
Well, before he was thrown into the pit of unimportant bullshit, LE poisoned John with some kind of weird damn poison that was slowly killing him. He dies and Terezi takes his body along with her on Dirk's whirlwind adventure to do more shit and keep the story rolling. He's effectively the author for the moment and John is dead forever! No more John.
But, what if John comes back? But, maybe not in the way that people would want.......what if........CALIBORN possesses his body?!
Now this I think sounds pretty out there until you start tracing things about John's journey. John always narratively occupied the space as the 'audience self insert', the emptiest of the kids to project onto in his inoffensive ability to be friendly with most everyone while maintaining the illusion of being his own person. He is the protagonist, the everyman, The Guy. He is, effectively, the PERFECT vessel once all his individuality is destroyed and his body left like a puppet with its strings cut. John, over the course of the story, has also accrued INCREDIBLE power with his Retcon abilities. His power over the story would be phenomenal, if John ever had the incentive to change things to his own liking. John, despite all this power, never really uses it in such an incredible way, and instead changes reality thanks to Terezi's own roadmap. His strengths are so intimidating that even Dirk appears eager to throw John in the trash if it means he doesn't threaten his control, even remotely.
Such a body would be a PHENOMENAL boon to posses explicitly but only one character shows the actual gumption to do such a thing to that degree, and moreso have a superior grudge against John that he would not only kill him but parade around in his body in some macabre display, a huge disservice to the Heir of Breath as a person even in his memory. John has had a death flag on him since Doc Scratch saying he would not die an ignoble death. John's key weapon is a Zilly weapon, which has roots in Cherub lore!
Speaking of Doc Scratch, Dirk comes DANGEROUSLY close to parroting his favorite line about being an 'excellent host'. If Dirk is the Doc Scratch, he'll precede the actual main star of the show, and set the stage for his master to once again take the stage. A Prince is merely the son of a Lord, but he may not actually be the true Heir.
I'll leave with some text I wrote inspired by this. Enjoy Caliborn-style lines under the cut, but if you get triggered by how misogynistic he is or whatever then please don't open it. I warned you, you're responsible now. We share a social contract written in fake internet blood.
Spoiler
Show
THE ONLY GOOD THING.
ABOUT THIS COMPLETELY IDIOTIC EXISTENCE.
IS THE FACT.
THAT I AM.
THE UNDISPUTED LORD OVER THE DOMAIN.
THE DOMAIN KNOWN AS.
"CANON".
DUE TO THIS ZAPPY MAJYYK.
THIS BODY AFFORDS ME.
MY BITCH OF A SISTER.
FROM ANOTHER TIMELINE.
WHO THINKS SHE IS POWERFUL.
BECAUSE SHE ATE MY PUPPET HATCHED BODY.
WILL HAVE AN UNPLEASANT SURPRISE.
WHEN I COMPLETELY END.
HER TYRANNY OF BEING.
A MEDDLESOME WHORE.
ABOUT THIS COMPLETELY IDIOTIC EXISTENCE.
IS THE FACT.
THAT I AM.
THE UNDISPUTED LORD OVER THE DOMAIN.
THE DOMAIN KNOWN AS.
"CANON".
DUE TO THIS ZAPPY MAJYYK.
THIS BODY AFFORDS ME.
MY BITCH OF A SISTER.
FROM ANOTHER TIMELINE.
WHO THINKS SHE IS POWERFUL.
BECAUSE SHE ATE MY PUPPET HATCHED BODY.
WILL HAVE AN UNPLEASANT SURPRISE.
WHEN I COMPLETELY END.
HER TYRANNY OF BEING.
A MEDDLESOME WHORE.
|| 
Perfection.
