Lots of 3D battle scenes with only a thin plot. It starts out with the "sky people" despoiling the land, but it turns out that what they actually want is about a pint of fluid from the brains of the sentient whales that are supposed to be more intelligent than humans, but who can't figure out a way to hire a lawyer to get an injunction against hunting them.
Apparently, that liter of fluid stops human aging, but the liter is worth only six million dollars. It looks to me like the process of hunting the whales costs more than six million dollars per whale. The movie ends without any resolution. It's as if this whole movie is a 3 hour trailer for Avatar 3. Lots of battles. No plot.