Spoiler alert. If you haven't reached the time-skip you musn't continue reading.
We've now seen after timeskip that Akainu is the new leader of the marines. I was wondering if he would allow Coby to continue as a marine? I mean, he did try to kill Coby because Coby didn't belive in the same "justice" as himself... Just a tought. And he's got Haki aswell now, you think maybe he'll join Luffy?