Tony Stark: Ego vs Heat
So Iron Man (by his little lonesome self), while testing out new armor flies into a dimensional warp. He ends up in the DCU and settles in. His knowledge of tech and weapons gives him a quick fortune and he ends up meeting Lex Luthor and Bruce Wayne on the same night.
Lex and Bruce make a case for him to join their respective groups after finding out who he is (Iron Man).
Does he go Lexcorp or Justice League? Who makes the better argument? How does Tony decide and what sways his decision?