GB: In the story, John Carter is a Civil War veteran who finds himself mysteriously transported to Mars, where due to the gravity he is able to leap tall buildings in a single bound, so to speak, a conceit that would pop up in the 1930s in Superman. A battered, hardened solider, he learns of the alien culture and falls in love with a brightly hued princess, not unlike ?Avatar.? In the Burroughs tales, leaders are called Jeddak, there are beasts called Banths, there?s a warrior rank of padwar ? all of those seem to echo in the Lucas universe, as do key concepts and themes. Does any of that present a problem? Does it box you in or create the risk that ?John Carter? will feel derivative to audiences that don?t know or don?t care about the chronology of the heritage?