What I was kind of hoping for (and I'm sure this is buried at the start of the post, from like 2 years ago) is that they could replace some of those scenes of the ENT-D flying with an Excelsior and replacing them with some other ship classes. Just for variety's sake.
Considering what we got for TOS Remastered, that certainly will happen at some point. What class(es) will replace the Excelsiors is really the big question. I think Nebulas and Ambassadors would be good choices.