Thats a tough one. Here are some ideas, tell me which one ya like
1. An amazon boat ride as you meander through a giant rainforest greenhouse surround by birds, monkeys, turtles and fish from the Amazon. Maybe an outdoor part with jaguar, howlers, tapirs, etc.
2. A James Bond themed roller coaster with the obligatory attached store
3. An actually scary haunted house at MGM preferrably with a Harry Potter Hogwarts theme but since that seems to be a goner, perhaps based on the Pumpkin King
4. A entire Narnia section of DAK centered around a White Witch flume ride, as you are harried by wolves, minotaurs, and nasty little dwarves. This could adapt some of the old Beastly Kingdom ideas
5. That little mermaid ride from the DVD either at MGM or next to Nemo at DAK
6. A Grizzly Bear walk thru mountain exhibit at DAK with Mexican wolves, cougars and a nocturnal cave exhibit
7. An Incredibles ride using the swirling dark ride technique of DL's Roger Rabbit ride. The idea: you're Dash swirling thru a battle between all the super heroes referenced in the movie and evil robots
8. New countries in WS of India, Brazil, and Egypt. With a dark ride in one and a thrill ride in another.
9. Turn Wonders of Life into a Meterology exhibit centered around Stormrider from Tokyo DisneySea