If this has already been brought up, I apologize. Although it is clear stated that this is THE Enterprise bridge, how do we know that it is the ONLY Enterprise bridge we will see in the movie? We know the plot involves time travel. I assume Spock is not coming back in time just to use up his accumulated Vulcan Ambassador vacation days. He is probably coming back in time because something has been altered and he needs to put it right. This could lead to one or more alternate realities in the movie. There may be 47 different Enterprises in the movie, all of them THE Enterprise, and all of them completely different from one another.
Or this may be the only one, and it's the bridge we will see in every Star Trek movie from now on. We just don't know for sure yet.