Each movie that you have chosen could have some great possiblities. For Jungle Book, you could have the infamous idea of a "soarin'" type roller coaster (suspended/dangle) and go through the Jungle. See it from a birds eye view.
Emperor's New Groove - Again, I hate to keep thinking coaster, but the first thing that came to mind when I saw the choice was the ride that Izma goes through to get to her lab. That or make it a water ride (since that's what Kuzko wanted - a swimming pool).
Black Cauldron - I'm invisioning a great dark ride. Going through the Horned King's castle. Lots of green....smoke...and of couse, Gurgi. But, alas, I fear they would never do anything really related to the Black Cauldron. It is still considered by most the "black sheep" of the Animated Classics (Although, I think we are about ready to hit another dark period AFTER Home on the Range - coming to a theatre near you April 2).
Hercules - Not sure what could be done here....boat ride/dark ride possibly going through the river Styx.
So, if Iwere have to choose between the 4...I'd go with Jungle Book or Black Cauldron. However, it were REALLY up to me....we would see a bit more Robin Hood:king: