Hmm...except the entire nuTrek is based on the premise that Nero changed the timeline, beginning with the attack on the Kelvin.
All we know is that nuTrek is in a different reality. We don't know if a) it was the same reality as the Prime U before the
Kelvin attack and was created (branched off) from there or b) it always existed in parallel to Prime U, and presumably was very similar (and still is very similar) but could have differences here and there previous to the Kelvin attack. (Even if it were 100% the same, it could have been physically a different universe the whole time. There's no law against two universes being exactly the same.)
This will remain unknown until we see something previous to the
Kelvin attack that differs from the Prime U, proving (b). Since you can't ever prove that everything previous to the
Kelvin attack, in the whole history of the whole universe, was the same, we'll never get proof of (a).
I'd argue that we have seen proof of (b). Scotty and McCoy are older than Kirk in the Prime U, and therefore were born before the
Kelvin attack. In nuTrek, they look different than they should. With the younger characters, we can rationalize that maybe the original Chekov is the brother of the guy who turns out to be Chekov this time - something in the changed timeline impacted his parents so that a different egg and sperm met up - but for Scotty and McCoy (and really also Spock) this rationalization doesn't work. Therefore, Khan can be female, or whatever.
EDIT: and before anyone objects that Scotty and McCoy couldn't have been cast to look "right," if the writers had been determined to go with a branching-universe notion, they could have kept their timeline "pure" by simply not having Scotty or McCoy in the story because their careers took them elsewhere, or they got killed off because of post-
Kelvin changes in the timeline.
I'll give them a pass on Spock because Zachary Quinto looks so incredibly much like Leonard Nimoy. Also because without Spock, you might as well not have
Star Trek at all.