Thinking about the Disney theme parks brings back something Andrés Duany said at the Bass Hall presentation a few years ago, that came from one of his books, something to the effect:
The Disney parks are idealized environments that subscribe to some of the major tenets of New Urbanism including designed streetscapes with interesting and varied architecture, walkable and extremely pedestrian-friendly streets, no cars and associated noise, smell, congestion, and danger, mass transit to the park; you never see your car for the whole day you visit.
It seems like the major new theme parks have attractions derived at least in part from hit movies; high-cost, wide target audience films with action, animation, and fast pace. Extrapolating from trends I would expect to see a theme park based solely or at least in part on Video Games, interactive 3D experiences with laser guns, loud noises, thumping repetitive non-vocal music themes, extremes in temperature and light, etc. There could be some fast roller-coaster rides to break things up, people probably would not pay $50 if there wasn't a range of things to do.