Confirmed rumor from cast member Bob aside...
As is always the case, the question is what would the BEST choice be, and given that other than in WDW, Florida's largest mountain is speed bump, I think they could do better.
Obviously Soarin' over the World could be great, since anything on the planet would qualify.
If they wanted another state, Hawaii would be about as cool as you could get. Volcanos, rainforest, huge waves, beaches, reefs, lava fields, canyons, huge waterfalls, pineapple fields, sugar cane fields, Honolulu, Pearl Harbor, etc.
No Disney park to promote of course, but maybe if they are going to open a DVC in Hawaii...