There is one sliver of hope here.
Orci, over on trekmovie.com, let slip that there is a plot-related reason why we've had a bloated, misshapen characiture of the Enterprise foisted upon us and wouldn't discuss it at this time.
So, yeah, it's possible we might get the "real" Enterprise back by the end of the movie.
However, I want that tidbit confirmed
before I plunk down any coin on this thing. Otherwise, they can kiss my canonista ass before I go see this thing.