pull some reason like he's gonna destroy the WG or something. make them do something that's rash and annoyed Enel. plot sure but I don't want to see akainu and Enel friendship die for nothing. idk they try hold something against Enel to control him and Enel goes angry.
the more I read, the less I want him to betray the marines, like it would be such a waste to destroy the friend ship between him and akainu, sengoku and garp, heck even Hina ( although I'm sure she won't bother since she is now in the simp zone )
Actualy I would want him to still be in the marine or at least an allt or undercover. And work togheter whit them to try to get the marines to split from the goverment.