I was thinking about this while my daughter was watching Honey I Shrunk the Kids and I realized just how old that movie is, therefore so are the attractions! I'd love to see them update the HS playground to A Bug's Life!
I think: Carpet ride similar to Soarin'
Monster's Inc, the door scene, as a simulator like Star Wars
Wreck it Ralph as a cool car track ride (maybe like they did for Cars)
Some kind of water ride for Lilo and Stitch
As much as I love Splash Mt, it seems like it needs some kind of story update, I had to explain the story to my daughter and then tell her its not a movie I could get for her to watch!