Re: [SPOILER?] to be in the film?
The old Star Trek: The first adventure/academy script featured an earlier Enterprise that was stolen from a museum. I don't see a problem with their been another Enterprise under a different register since we are on new terms here.
April's Enterprise against Kirk's Enterprise would be a wet dream.
"It's not that you can see the strings, it's that 40 years later you're still looking at them." - Steven Moffat
"This movie was big. Imagine how big it could have been with me in it?" William Shatner