It was the worst way to spend 3 hours!!!
The movie was so bad that I was wondering what would've happened if James Cameron hadn't filmed Titanic, if 250 millions hadn't just been poured into only visuals and marketing?
If Mr. Cameron is so into visuals, maybe he should consider documentaries instead of movies.
Back to the movie itself. The plots were just senseless: Jake's first son was so perfect that he had to die and his second son just had to be the main character in the next movie so he was free to do anything he wanted. The princess had to fall in love with him at the first sight. Of course!
If Jake's second son had to be the main character, you had to first let the audience love him. Then, it at least made the audience feel good -- for example, Messi's fans would've been happy regardless of how Messi won the world cup. Yet, as the movie unfolded, the second son was just a random person to me, and at one point he suddenly became the main character. This made me feel sick.
Finally, let me give Mr. Cameron some credit (I meant I gave 1 star instead of 0): from Avatar to Avatar 2, Mr. Cameron did help push the filming and visual technology forward.