Full story at TrekMovie.com:

Abrams: Next Star Trek Needs To Be ‘Most Meaningful’ – But Not Called ‘Star Trek 2?

The second one has an obligation to go deeper and maintain the fun and adventure in the sense of optimism and scale that [‘Trek’ originator Gene] Roddenberry created. But I do think it has to evolve and not become some polemic over-the-top, on-the-nose allegory. It needs to be something that is not just about the characters meeting each other and having their first adventure; it needs to be about having their most meaningful one.