#1. Turn LMA Stuntshow into Piston Cup-themed World with different, innovative Dark ride (like Dinosaur) featuring prequel story of how Lightning McQueen got into racing and you have to help him train for races. Easy to develop, fun character recognition, and not too much construction involved.
#2. Turn Streets of America into Lucas Arts World. Muppetvision building stays and story is replaced by Jedi Academy film with 4-D effects, a la Tough to be a Bug, but with seats that move like Captain EO. Finale is Darth Vader crashing through the wall and telling everyone to get out-but it turns out to be a hologram.
#3. Expand Pixar Place and turn Studio Backlot Tour into Monsters University with ride. Reuse movie props for "educational" queue lines with real world scream villains.
#4. Voyage of the Little Mermaid moved to BatB Live on Stage. Replaced with Frozen, add skating rink.
I think that about covers it.