Poised to plunge into distribution tomorrow, Disney’s elaborately retro space opera “John Carter” is the movie that dares to ask, “Would a Princess of Mars ever consider marriage to a wayward Virginia cavalryman?” It’s a proposal worthy of Newt Gingrich. Still, this quarter-billion dollar, retrofitted 3D production is hardly the “Waterworld”-scale debacle that many feared (or hoped). Read more here…