If the Phoenix Force ended up in the DC universe and possessed any 5 heroes/characters, who would it be in your opinion? How would it end?
Batman would get it cause, well, he's Batman.
He will never be corrupted with the Phoenix Force because he will have some secret gadget in his utility belt that would cancel it out. Or we will have a flashback in his training that could explain why he could not be corrupted. Either way, he's still patrolling Gotham City and ridding them with low-level criminals. Powerful criminals won't be coming to Gotham, other superheroes won't dare either.