User blog comment:Blackendedsoul/The promotion(s)/@comment-3242083-20110307230243

I doubt they promote any of the current admirals. Doing so would essentially remove them from the battlefield. Aokiji could be an option since he is very passive anyway, but his moral justice seems to not fit with the rest of the government. Akainu seems to be the choice for hunting down big shot pirates, it would be a bad choice to place that guy behind a desk. And Kizaru...well that dude can't even handle a freaking Den Den mushi, it would be exceptionally retarded to promote him.

My guess: Kong will "step down" and fulfill the role of the fleet admiral directly himself, on top of his current rank as commander-in-chief. It would be a great way to introduce the character as well.