I think I would like to see something original for the next movie. I would like a lighter movie (i.e. Star Trek IV) and not with a heavy villain. I'm not sure we will that again since Abrams has attracted newer fans with constant action. It could have a strong story and action but not the Enterprise blowing up or Earth about to be destroyed.
If they intend to use Trek lore, then have Kirk encounter the Borg. I always wander how Kirk would have handled them. Maybe since Nero's ship had borg tech, the borg detected it and are now heading towards the federation.