I was really hoping to see a Tron themed ride or park section. (Both the original Tron and Tron: Legacy movies are among my absolute favorites.) Part of me will always hope for a Tron themed ride. Even though I'm not holding my breath.
I think a Star Wars themed park within Disney World would be a fantastic idea. Certainly makes more sense than Avatar, but I'm excited for that regardless. It does seem smart to wait and see what elements people like about the first new movie. Although, they have a lot of material from older movies that they could build upon.
I'd also LOVE to see a Lord of the Rings/Hobbit/Middle Earth theme park. Would probably be an insanely expensive investment, and with the movies over, again, I'm not holding my breath.
One thing I wish I could learn more about is Busch Gardens Asia, but there's not much information on it except it was in Houston and ran from 1971 to 1973. I wish so much that SEAS would build a new Busch Gardens Asia!
So much wishful thinking
As far as location goes, the Rocky Mountain area is a bit underserved. We have a lot of very nice small parks (Western Playland, Cliff's, Elitch Gardens) but nothing from Cedar Fair, and Six Flags once owned Elitch Gardens but they sold it years ago. You would think an area that has more sunny days than the rest of the country would have more parks. Especially with things like the Grand Canyon and the Rockies around, they draw quite a lot of visitors. There's nothing large between Knotts and Six Flags Fiesta Texas. Land's cheap out here. And there's no lack of population! I wonder why the mountain area is ignored by the major chains? There must be a reason they don't see it as being profitable.