Everyone keeps saying how Star Wars locals are nondescript and somewhat nebulous. Well, in all of Star Trek, there is only ONE location. The "Bridge" of the Starship Enterprise.
Since Disney is building a full sized Falcon that we get to fly, I don't see Universal going that route. So maybe a multi media show is what we get. But they better pull out all the stops and blow us away.
I personally have little interest in the Falcon ride.
Honestly, it would be hard to top the Vegas Experience. I think taking a tour of the ship followed by a shuttlecraft ride is really kind of the ideal format for bringing the Star Trek world to life and having an adventure there. If Universal were to do anything they should expand on that concept, provide more areas of the ship to explore, a Ten-Forward-type lounge, etc. The question nowadays is which iteration of franchise do you build? I don't think anything has quite reached the iconic status of the TOS movies and TNG show, but Universal clearly isn't going to build anything new based on older properties like that.
What I envision is that you end up on an Enterprise that has had some kind of time travel accident and has become mashed up with several different ships from different eras, that way you could feature something from all the shows and movies. It could have Kirk's bridge, you wander down the corridor and end up in Picard's engine room, turn a corner and you're in part of the Promenade from Deep Space Nine, a Klingon bridge, a Borg cube, etc, with all kinds of streetmosphere-style characters from those eras scattered throughout. You could have the option to either just explore the ship at your leisure or go on an interactive adventure to help fix the ship (obviously with an interactive tricorder or communicator or something available for sale like the Harry Potter wands!). And then, of course, you've got to go on some kind of shuttle adventure to escape. All this would allow them some flexibility with some of the cast they could get to film stuff for the attraction. Say, maybe, they could get Patrick Stewart, Simon Pegg, George Takei, Jeri Ryan, and Scott Bakula. They could keep it updated with whatever new series and movies come out. This would also maximize the marketing and merchandising opportunities. You could truly advertise it as the ultimate Star Trek adventure.
Doubtful this will ever happen, of course, but that's just what strikes me as kind of the ideal scenario that would hold the broadest appeal to the widest range of people and drive the most turnstile clicks and merchandise/food sales.