I have zero qualms with Big Hero 6 in Epcot. It is about the only franchise that wouldn't need to be massaged to death to make sense in a Futureworld Pavilion (whether it be health, tech, or both).
Sorry to everyone who feels otherwise, but Tron from Shanghai just doesn't fit Futureworld. Aesthetically yes, but not thematically. I think people just desperately want that bike coaster.
Pretty much the only franchises that organically make sense are a Tony Stark Expo (obviously out), Finding Dory's Marine Life institute (currently botched) and a BH6 Science/Tech/Health pavilion. Inside Out is an ok candidate for part of the Imagination pavilion. Wall-E is an ok candidate for a new concept conservation/environmentalism pavilion.
That's if the goal isn't to throw Future world out entirely.