The Disney-owned Marvel Comics has announced that it will produce a comic-book prequel called John Carter: World of Mars, written by Peter David and illustrated by Luke Ross.
From the link:
"John Carter is, of course, a presence in the comic. However, Disney wanted it to be a prequel, which is fine, and to be set on Mars, which is also fine. But they also wanted John Carter in it, which made it a tricky needle to thread since if you want a prequel set on Mars, then obviously Carter wouldn't be there. So I decided to have John Carter be the first person narrator, even though the story actually occurs before he arrives on Mars. I didn't want to go into too much detail as to John Carter's background because the movie basically tells his story, and the viewer should have the opportunity to discover that. Basically, John Carter is relating to the reader a story -- or more correctly, a pair of stories -- about Barsoom as it was before he got there. The thrust of it is that several characters are saying to him, 'For you to fully understand the situation you're in, John Carter, here's the story of some events that occurred a while ago.' By bringing him up to speed, by extension they bring the readers up to speed as well. Is it necessary for understanding the film? No. But, just as novelizations also do, it fleshes out what's on the screen and provides a greater frame of reference for the viewer. It gives you a better sense of the tapestry against which the film story is being woven."
...interesting because it looks, from the trailer, like the movie itself will retain Burroughs' framing-story of having Burroughs read John Carter's memoirs. So the comic will be doing the same sort of thing--but will it be presented as coming from Carter's journals or are we supposed to assume that Carter is narrating directly to the reader? I was wondering how they would fit John Carter into a prequel (well, since John Carter is immortal they could have done it, but he wouldn't have had much to do with Mars). This sounds like the simplest solution, I guess.