I don't know if it'll be that bad considering its awesome cast: Marty Scorsese, Robert De Niro, Jack Black, Renee Zellweger and Will Smith..also Angelina Jolie, but I really dislike her. I don't think it necessarily has to be a ripoff just because's it's also about fish and is animated by Pixar. Finding Nemo afterall was a coming of age story, while with Scorsese and De Niro in the fold I'm thinking this'll be a satire of some sort.. if you've seen the previews you'd note all the references. Anyway not expecting it to be better than Finding Nemo, but should be good nonetheless