Call me an idiot if you like, but is it explicitly stated in some companion to the film that Star Trek XI is in an alternate universe?
It seems to me that Spock Prime and Nero simply travelled directly back in time and changed the Prime Universe's timeline, they didn't create an alternate one.
Otherwise, that's very different from previous time travel in Star Trek. The Ent-C in "yesterday's Enterprise went back and changed the UFP-Klingon war timeline, right?
I mean, there's not still a timeline with the heavily militarized Federation fighting the Klingons, while seasons 4-7 of TNG are in an alternate timeline, is there?
it's been assumed that changing the past changes THE SAME TIMELINE. When did the rules change for Trek XI?