How about it they build a theater in Epcot and move the Nemo musical over there, bulldoze carnival part of Dinoland, add a Good Dinosaur dark ride next to Dinosaur to keep a mini Dinoland in the park, then use the remaining land from the bridge to Asia to Dinosaur to build Australia. This would only make too much sense though adding at least 1 IP, have a new draw for the park once the Pandora hype dies down, and not have to expand the huge park anymore than it is now.
Good Dino isn't going to get much love... It was the biggest flop of Pixar's history.