If that happened it'd probably be themed to Finding Nemo like they did in Disneyland, unfortunately. Tokyo DisneySea has like an entire Jules Verne section of the park including a Nautilus/20000 Leagues attraction.
Does this mean that the 20,000 Leagues Under The Sea attraction reopen at the Magic Kingdom? I miss it!
The lake has been filled in, and you would never even know there was a body of water there. Pooh's Playful Spot (which was supposed to be temporary, but has been there for years now) exists there now.