Maybe they could take over Sinbad and make it, like, the Quest for the Horcruxes or something...and guests could walk through all the places they find the Horcruxes. The cave, the Chamber of Secets, Room of Requirement, etc.
Oooorr, I just wish they would make the whole Lost Continent Diagon Alley!
They could do that... It's a possibility that they could make Diagon Alley (with a Gringotts rollercoaster of course xD) and have King's Cross set up and ready to take people to Hogwarts (a simulater with a few train cars and train compartments to actually have the real feel of a train).