I'm currently reading the Barsoom books again, I've begun the sixth (Ulysses Paxton) this morning. Awesome read. Aren't at least the first three books in public domain now ?
That would make an awesome rpg if someone manages to capture the spirit of adventure contained in these novels. The downside could be that, if you want to fully respect what Burroughs wrote, the roleplaying may be somewhat limitated in places (all those heroes and heroines come more or less from the same mold).
More often than not, the books are great because each time we discover an unknown and strange part of Barsoom unheard of. Discovery plays a huge part of the appeal. It may be hard in this case to compete with Burroughs' imagination !
Unfortunately, the movie's teaser did nothing to me at first sight. John Carter doesn't seem that charismatic (I would have preferred James Purefoy, who is also in the movie, but as Kantos Kan !), Barsoom does not seem exotic enough, Dejah Thoris not that attractive that she can provoke wars because of that, and she doesn't seem to be happy with the sole "damsel in distress" role (has anybody seen a Barsoom girl wielding a sword before ?). Poor Tars Tarkas is now as tall as Sola and doesn't have his eyes in the right places... We'll see the final result, the one thing I'm happy with is that they didn't go with the "boom-boom" Brukheimer's kind of trailer. That gives me a little hope that it could turn good after all.
If only we had that 1931 Bob Clampett full-lenghth animated feature ! I just can't believe this story took one hundred years to be properly adapted... (I'm not counting this 2009 Asylum stuff)