The whole movie is overindulgent tripe. The villains are even shallower than the in first, the natives are even more annoying and they now adopted weird American teenage mannerisms.

Lots of people praise the visuals, but they are ridiculously repetative and way too polished to be realistic. Physical props of the "whales" look very fake. As with the first movie, the only truly stunning visuals are those where large scale human tech is shown, especially if they bother to make these effects practical. Specifically, the highest point is the boat-launching scene. This also happens to be the scene with the best soundtrack, if only for all of 30 seconds.

The movie is best to watch with fast-forward function available: you can easily skip a good third of it in total, without missing anything in terms of plot. I can only imagine the headache you'd get from being forced to watch the entire 3 hours on the big screen. :(