Is John Carter Of Mars To Be A Disney And Zemeckis Motion Capture Project?

I've recieved three e-mails in the last half an hour all suggesting the same thing, but I have to ask you: could John Carter of Mars really be Robert Zemeckis' next film, after Beowulf? Gossip in motion capture circles, such as they are, seems to be suggesting so.

As reported earlier, Zemeckis and Disney are teaming to open a state of the art Motion Capture facility. As reported even earlier, the rights to make a movie of John Carter of Mars are heading to Disney. It seems to add up, so I'm off to investigate... Zemeckis or Pixar, both prospects sound pretty remarkable to me.

[EDIT: Could Heidi MacDonald be the source of these rumblings? A comment left below suggest so. She couched it as pure speculation, however, whereas I'm told it is a genuine possibility. We'll soon find out]