http://www.rottentomatoes.com/m/last_airbender/Jenner wrote: Additionally, please come back to this post and see this lovely I told you so after you read a The Last Airbender review.
However, I'm still not sure that this means the movie betrays the original. As much as I like the Avatar series, you must admit, it's not high art. The word "joyless" seems to be popping up a lot though, which is too bad because I don't think I would ever use that adjective to describe the cartoon series. Still... whenever kids series are released on the big screen, I have to wonder if the problem is that these movies just aren't for the critics. Granted some children movies are just amazing and can be enjoyed by anyone (Studio Ghibli and Pixar come to mind), but some can't be. I think Avatar the series might fall in between.
Still, the obvious warning sign was that the movie was live action (also, there were some odd casting decisions http://www.penny-arcade.com/comic/2009/6/24/heresies/). Still, I try to give movies the benefit of the doubt. I'll probably still see The Last Airbender when it comes out on DVD (almost said VHS).