Only the Disneyworld version was 20,000 Leagues themed. They plowed it under for a Winnie The Pooh kiddie playground! Really sad, as the subs were cooler looking than the Disneyland ones.
In any case, I'm glad they brought the original back. It sat idle for so many years, fans speculated the subs would rust away to nothing before anything was done. And how many rides in this digital age actually take you underwater? (Sort of!)
They need to bring back the live mermaids though. ;)
I followed someone's photo blog during the reconstruction of the ride, and seeing the lagoon drained with all the old animatronics visible was surreal!