More of a note-to-self:
A PJO/Chaos fanfiction, where Percy (by chance and bad luck) ends up in another galaxy, joins some intergalactic army of (not neccessarily) Chaos, then works his way up the ranks, being noticed by deities not from earth, slowly winning over those extraterrestrial gods, ending up with a favor he can ask of them, then coming back to Earth. Never meets Chaos personally except it is reasonable, like for example gaining some special award or being promoted later on (IF he makes it that far. Promotions that put him in a position of having to order lots of people around, for example). Also, just slightly OP Percy, possibly gaining one more power. Generally, Percy seen as normal or not fitting in because he's different, not because of his powers. No revived friends, no contact to Earth at all.
Beecause, in all honesty, the Chaos fanfics predominantly follow the principle of Percy being some sort of Heir of Chaos or generally an all-powerful savior of the universe. HE COULD NOT FIGHT ATLAS SOME YEARS PRIOR! OBVIOUSLY HE GOT STRONGER but being strong enough to just destroy one of the principles of Creation? Nah.
