I’m game for a BTTF overlay. My only concern is that a BTTF ride kind of insists on us being in the DeLoreon, but I would much rather have this than no BTTF ride at all.
Like others have said, adding practical elements everywhere would be great. I think it would be great to have an AA Doc and Marty in the preshow scene and then the CGI Doc, Marty, and maybe Biff in the musion scene.
Having practical Kuka effects in the speed tunnel scene would really make this stand out. I think I heard back in 2014 before Supercharged opened at USH they wanted to have cars on each side of the tram and a helicopter suspended on a Kuka arm. I think that was cut for budgetary reasons.
If they really want to hide the practical effects in the 360 room, they can have some walls that fold up with a strobe and fog blast as a “grand reveal” nit unlike the preshow for Cosmic Rewind and the finale for Poseidon. Speaking of which, now that Poseidon is gone, it would be a great way to bring that effect back.
Although this ain’t the preferred setup for a BTTF ride, I think it would be a good overlay, but more so for Hollywood.
EDIT: Feeding off my hyper fixation, if they want to take it a step further, project onto the ground and the walls where the air and wind are at showing the ground rushing past us to really sell the speed tunnel. I don’t expect them to do that but it would be great to sell the illusion in every way possible. The infrastructure is there, so maximize it!