I would love it if more films were made. Obviously canon is a big issue, for example, the Romulans were 'never seen' face-to-face until the TOS episode "Balance of Terror", so it will be interesting to see how they are portrayed by JJ Abrams in this film.
For the possible sequels it would be wonderful to maybe see other species being used, maybe we can see how the Suliban (from Enterprise) were doing, and maybe another Temporal Cold War plot, it could include the Tholians.
Another idea altogether is that time travel stories are placed on hold for the time being. In the new film, time travel of some sort is taking place, and I realise that it's difficult to fit everything into canon, you know, tie up loose ends. But we'll see. I'm eagerly anticipating the new film.