The question is, what can a sequel bring us? Those involved also have to bring us a story that we haven't already seen. We don't need a simple rehash of previous stories. But how can it be explained if things occur in a different fashion?
This is where the idea of an "alternate universe" comes in. We've seen it happen with Eric Bana's character, Nero. He (and Spock) changed the course of history for the characters that we knew. This not only gave a story for the first movie but gave some freedom to the writers. Alex Krutzman discussed this with MTV the other day.
One of the obstacles that we found ourselves butting up against [when we took on the job] was this idea that we already knew the fate of the characters. If you're going to bring a whole new iteration of 'Trek' to life, you could never put them in any real danger — because you already know how they either died or lived. So, we felt like, all right, we have to find a way to make the future unpredictable, so whenever they're in these difficult, treacherous situations there truly is the risk of death.
So none of the characters are essentially "safe." I like that. It adds to the suspense of a good story. It was also mentioned that they probably won't deal with time travel again any time soon. The device that allowed it was destroyed.
Now we have to sit and wait for the next movie to come in order to see where these characters will boldly go.
Do you like the idea that the characters are all essentially 'starting over'? Do you like the possibility that the characters can veer off the path of what they've done before?