A SpongeBob Themed Dark Ride
For you non-Spongebob fans out there, a Recurring theme is that Spongebob is in Boating school and can't graduate cause he's not the best driver (To put it mildly) and allows 1001 ideas regarding a dark ride. The ride would be themed to Spongebob trying to get his boating license and hi-jinx ensue. The ride would've featured only Audio-Animatronics instead of screens and not be interactive, Outside of that, the ride would've been similar to Justice League. The queue line would've featured a Ms. Puff's explaining how your all trying to get your Boating License. The entire ride was inspired by an episode of Spongebob called "Tutor Sauce"
Or A SpongeBob themed Rapids Ride
Inspired by Popeye & Bluto at Islands Of Adventure, The entire ride would've had more theming and more water effects themed to SpongeBob and Patrick going Jellyfishing which of course they retaliate "accidentally" instead of SpongeBob by splashing the boats. The station would probably have been themed to a Pineapple as well. There would probably be cameos by other SpongeBob characters (Squidward playing a Piano that works as Jets, Sandy dropping buckets of water from her Treehouse to keep you wet, and Mr. Krab's selling ponchos at the end for $20. Also inside the tunnel would be Plankton trying to create a Dry-You-Quick machine that never works) This plan would have been awesome and would guarantee that you would never get off the ride dry.