In my opinion Avatar, directed by James Cameron, is a brilliant movie.
The move explains the history of an American invasion to another planet, Pandora. American army try to invade the planet to have in his own a odd mineral that is only in the planet. But the natives, Na'vi tried to stop these acts.
The main caracther does a track suit to camuflate in the native tribes to explain why they are doing that and explain that if a Na'vi tries to stop these, they will kill him. The protagonist falls in love with one Na'vi, and he revealed against the American army. Then the general of the army decide to kill all the Na'vi.
Well, I'm not going to explain more because if you haven't seen it yet you'll be disappointed. The film got a fantastic expectation because it was the first 3D film in the history of cinema.