Gotta agree with those that understand what this film really way--a giant dump taken on the entire Star Trek franchise.
Deny it all you want, but this movie DID erase EVERYTHING. The original series, all the movies, Next Gen, DS9, Voyager (well that would be no loss), none of them will ever exist now, nor will any stories ever be told that include them. For all intents and purposes, in this new Trek universe, nothing that has ever happened is relevant anymore, except maybe for Enterprise.
Yeah, parts of the movie were really well done. They got the characters right. The movie was fun and at times, quite engaging. But the story was just horribly written--lazy and full of huge plot holes that even the most average of scriptwriters should be embarassed by. It's like they spent all their time on getting the characters and special effects right, and then spent 5 minutes writing a story to use them.
What is so stupid is that throwing away everything was so completely unnecessary. The whole point of having a universe such as Star Trek is that there are infinite stories to tell. But apparently they were too lazy to figure this out and just said "throw it all out so we can do whatever the f' we want."
Like someone else said, why don't we reboot Star Wars next? I know--we can have the emperor send someone back in time to kill off Luke as a kid (making it look like a moisture farming accident of course) and then center all the movies around Leia instead. Unexpectedly, she will be able to save Darth Vader and they will go around the galaxy as a kick-ass father-daughther crime-fighting jedi team! That will sell tickets for sure!
There were plenty of Star Trek stories left to be told without just throwing the entire known universe away. The only reason to do so was just abject laziness, and a general lack of any respect for the Star Trek universe. Oh, and I guess to make craploads of money from non Star Trek fans, which it looks like they are being quite successful with! All hail the pursuit of money over all else!