4. Tron
This was actually rumoured for some time and there was a temporary event based on the film at Disney's California Adventure called ElecTRONica, but nothing has ever actually been developed in terms of a ride or permanent attraction. Of course, the only possible aspect of Tron that should ever be turned in to a ride is the Light Cycle matches/races that take place in the virtual reality world known as the Grid. The queue area of the ride could be themed like the ENCOM building (ENCOM being the company responsible for the virtual reality Grid) and the ride could see the park guests entering the Grid as human players to go up against the a humanoid computer programme in a Light Cycle contest. The special effects would be amazing and being fully immersed in the world of Tron would be completely exhilarating and awe-inspiring. It would have the potential to be one of the best motion simulators of all time and could include second-to-none 3D effects.