It's being released next year to coincide with the 100th anniversary of the first John Carter Of Mars story publication.
It's amazing to realize, after doing some research, that something as fantastic as this has never made it into movies or TV - while Tarzan, by the same author, has been remade many times over. There have been attempts as early as the 1930's, to do it as an animated project. It's been the past decade where - thanks to CGI tech - things have really intensified, with it almost being made by Robert Rodriguez and then Jon Favreau. I knew about it really just by reputation as a kid; Marvel did a comics series for a few years in the 1970's.
It has never been made before, but it's influence is everywhere in science fiction and fantasy, from writers like Robert E. Howard and Michael Moorcock to films like Avatar, which borrowed heavily from John Carter.
Andrew Stanton is an inspired choice to direct. If Robert Rodriguez had done it, it would have been a cheesy actionfest, done tongue in cheek. Looking at the trailer, I see the same filmmaker-poet who did WALL-E for PIXAR. 👆