I mean, if you're just looking for any old something to airbrush on your van, go with a skeleton with breasts riding a dragon. That's the ideal. But if you're set on a John Carter motif, definitely go with this:
The limited edition poster, designed by the poster whizzes over at Mondo, will be handed out as available at select midnight IMAX screenings of the Andrew Stanton-directed sci-fi epic. If you want one, prepare to get there early, and prepare for a couple guys to be using the rolled-up posters as makeshift lightsabers. That will be happening.