I waited enthusiasticly for this movie...but after watching it I was really dissapointed... It's basically the same as the first Avatar movie, only that the action is happening on water (or underwater).

Furthermore the first movie had that novelty factor explaining about what avatars are, abou tthe na'vi and you also had that wow factor due to the visuals of the alien world.

Now, there is nothing new, now we already know what "avatars" and na'vi are, it basically becomes an action movie with blue people (larger smurfs) There's really not much more to say, nice visuals, nice effects and aquatic creatures however there is no true plot (humans want resources) and nothing really different than the first movie... I'm curious if the next movie will be the same just maybe with a na'vi tribe living underground or something...