Here's an idea for a 20'000 Leagues ride. It's called Journey to the Sea, and it's a dark ride/water ride. You have a pre-show that explains that you are to find out the secrets of the Nautilus. After leaving the load area, based around a harbour, you go out into the ocean, where you are on collision with the Abraham Lincoln, before making a sudden drop to escape the chaos. You arrive at the bottom of the ocean, where the crew goes searching for treasure. You rise to surface, mimicked using a lift hill, where you arrive at the Cannibals Island, where you escape the war dance. Then, you arrive in the middle of the squid battle, where Nemo's voice tells you to get away, before you drop to escape the squid, where you arrive at Vulcania, where you are ambushed. Luckily, you escape back into the unload area, where you arrive in a gift shop.
Right that's my idea! Opinions are welcome!