I think if it was really going to be mostly a clone of Hollywood's experience, they would of just altered the building and used the musion in place in the old Frank Kincaid's screening room preshow as the nightclub musion scene in the tram experience. It would of made for a very similar set up and been very easy to rip apart the main show and overly screens and 4D effects to spray at the tram.
So there is one positive thing I can say, it should be a ground up attraction. I just hope it is great because I feel it needs to be supreme on its own without the source material.