They've tried to figure out for years how to get Shatner into the Pine-verse, but despite Abrams creating his own new timeline he for some reason feels constrained by Kirk dying in Generations.
The fourth Star Trek film, the one with the whales, was pretty much the most successful, the most fun, and downright wacky. They should dare to make a movie that would be fun.
I suggest they have Pine's Enterprise thrown into the FUTURE of the Mirror universe, a timeline ruled by the ruthless Supreme Emperor Kirk, played by William Shatner. He could ham it up, Khan-like, be on a ship more like his own Enterprise. You could even have Takei, Nichols, Koenig in it if they were up for it. Perhaps they could play with the Shatner-Takei feud by having the Takei and Shatner characters be at war with each other in the film. Shatner could say to Quinto, "You're not Spock," which I doubt the film would go for. Pine could say, "I am James T. Kirk." and Shatner could furiously yell, "I AM JAMES T. KIRK!"
Anyway, it could be campy and fun, and the first Pine-verse film I'd see.