What actually happens:
Akainu: K-karada ga ugokanai!?! Yamaro Dofuramingo!!
*Doffy has him impale Hibari, who's there for some reason, and flies off to Dressrosa, happy as can be.
Years later, Sakazuki debuts in his own movie: One Piece Film A.
The movie follows Akainu post-tragedy, where he gets to grips with losing his daughter and left arm in such a traumatic manner. Following his departure from the Marines, he decides to launch a terroristic campaign against them under the banner of the 'Neo-Marines', aiming to nudge them towards a harsher, unrelenting stance against piracy.