EPCOT has The Seas with Nemo and Friends pavilion, but the pavilion does not have an actual ride, as the omnimover does not count. A good/great pavilion has one restaurant (check), one show (check), one dark/boat ride (check), and one D/E-Ticket ride (uh...).
As you can see below, there is a ton of space for an attraction between the pavilion and the parking lot. This area north of the pavilion could have an attraction connected to the main building by an indoor/outdoor path that doubles as a queue (like Soarin', although it would be a lot smaller).
The land is picture above, with the parking lot in the top left corner and the pavilion the grey building in the bottom right corner.
Crush's Coaster is a very popular attraction at WDS and is one of the upsides of the park. A cloned version of the attraction can easily fit in that space (according to Google Earth measurements) and complete The Seas with Nemo and Friends pavilion as well as give EPCOT another attraction, which it could use.
What do you think of the idea?