Honestly - and I’m sure this has been suggested before - why not retheme Springfield as Hill Valley?
I feel like BTTF is the ride everyone misses the most, and we all know the Simpsons ride building takes up a huge footprint; if you really wanted to, here would be your opportunity to remake BTTF as Studios’ version of Forbidden Journey.
Only trouble I’d see is food and beverage stuff; Hill Valley doesn’t have very many well-known commercial places. You could bring Doc’s Fried Chicken over from Hollywood, but what else? We didn’t have this problem before because the predecessor to Fast Food Boulevard was...[gulp]...International Food & Film Festival.