A couple of months ago we got the roller coaster, and, although the freefall tower might become a set, I think its too soon to get so many information and a clear image.
The only thing on having a Hotel is that, in the moduar building scale, it wouldn't be enough space to have many rooms for the guests, lobby and other features. But ithe Hotel continues being a potencial candidate.
HI,
Another possible set could be a haunted house, with multiple secret doors and scary things to scare the visitors. And many rooms, false doors, corridors...