The movie adaptation of Edgar Rice Burroughs' seminal science fiction novel A Princess of Mars may have been a commercial failure, but the visual effects, and the concept art behind the visuals, represent the highest level of industry excellence.
Artist Michael Kutsche has kindly shared some of the character and creature designs he created for John Carter with the interwebs, and it should be put together in a book with the rest of the concept art for the movie right away!
Link --via JazJaz
--another concept art Link