Why Nemo? Why bring back the subs and have it tied into the movie Nemo? Does Disney really need to tie in an attraction with an arguably forgetful movie to believe it will be successful? In 15 years will the movie Nemo really be that memorable? Is it even that relevant today?
I think a more impressive attraction would have been a sub ride without a fad movie as a crutch.. like with POTC or HM... let it have its own story. Make it unique, introduce us to a new storyline or adventure. There are lots of wonderful and amazing things about the ocean on its own...the Imagineers should have brought us into their world, not Nemo's.
If you believe that Nemo the movie will prove to be as timeless for example as Peter Pan, or Alice in Wonderland, I respect that... I just don't think so.