Now that they're writing again, the game is afoot and the guessing begins. Literally, the first actual plot rumor - not just, hey we're gonna have a plot someday but an actual rumor about something that is actually going to happen was posted at Trekmovie today. There's spoilers if you click the link.
Personally, I hope Gary Mitchell isn't bad in this incarnation, not just in the next movie, but at all. It would be nice to see something good come out of this, but the stuff we wished hadn't happened to Kirk - Gary and David dying, for example - maybe this time around he gets to have those things?
Just a thought.