About a year ago, Walt Disney Studios chairman Rich Ross did something noble, true and just — not something that Hollywood executives do very often. He closed a production company called ImageMovers Digital, which, under the sinister vision of Robert Zemeckis, had specialized in using motion-capture technology to create family-friendly animated fare foist freakish, zombie-infested abominations like The Polar Express and A Christmas Carol on moviegoers. According to the New York Times, Ross pulled the trigger after seeing early footage from an Imagemovers film that his predecessor had greenlit called Mars Needs Moms. The studio was in too deep at that point to scrap the film, but Ross knew that enough was enough: Disney wouldn’t be in the corpse-animating business anymore. Not under his watch.