I've spoken on how the BTTF Party Bus idea could end up being good, and I love the idea of incorporating Hill Valley into the park as a sub-land.
... but with such a primary location and an IP so beloved, IMO it would have to really surprise us with stuff like an animatronic Doc and Marty, some impressive 'musion effects, high-budget and high-fidelity animation, multiple different "missions" a la Star Tours to really genuinely match the bar from the competition.
It's a legitimate shame that USF won't likely be getting anything to match rival park DHS' terrific lineup anytime soon. (Yes I know about the coaster it'll be great I'm sure). Innovative multi-faceted experiences like Rise of the Resistance or Tower of Terror, or even just well-budgeted and engaging rides like M&M and Slinky. Star Tours is still getting consistent updates to this day, and it's one of the oldest simulators in the area. DHS' lineup isn't the best, by any means, but for its' lack of quantity, it has a remarkable tendency for all-timer attractions.
Villain-Con is an unimpressive and confusing mess of a game that looks visually very bad. Dreamworks Destination is clearly low-budget and commonly forgoes fabricated character statues, instead using cheap flat cut-outs of pre-existing renders like we're in Six Flags. They still haven't filled the Fear Factor Live ampitheatre. They are not updating their older simulators with new content like Star Tours, but updating them to remove 3D and other features that make these dime-a-dozen rides more enjoyable. (And yes, it's bad when Disney does it too.) Supercharged.
The only attractions we've gotten relatively recently at USF that I think pull this off are Bourne, and ... Fallon, maybe surprisingly. Bourne for obvious reasons. It's a really solid and entertaining show with lots of really cool tech integration that considerably expand the limits of theme park stunt show setpieces. And Fallon, by way of its' interesting waiting room queue set-up, with games, TV, and actual exclusive live entertainment offered to those inside. The actual ride itself is basically the same as every other simulator in the park.
USF needs an innovative Drop ride, a Rockin' Boat ride or something equivalent, a dark ride that doesn't just feel like a less good Spider-Man. I want boldness out of USF. Something, anything of interest besides worn-out simulators, a few solid high-thrill coasters, and the three 30+ year-old classics I've seen since forever. If HHN had rides like Tower, Rise, Slink, M&M available, the event would have one of the best attraction lineups in the state. I currently believe USF is very near the bottom, in contention with the run-down Busch parks on non-event days.