The Marvel superhero pic tumbled 66 percent in its sophomore outing domestically, compared to a 53 percent drop for DC's 'Superman.'

Marvel's big summer tentpole held on to the top spot at the domestic box office in its second week of release, and the margin of victory was significant. This weekend's silver medalist, the animated sequel The Bad Guys 2,

Marvel's first family stumbled in theaters in its second weekend, but still held on to the top spot at the box office. “The Fantastic Four: First Steps” earned $40 million from 4,125 North American theaters,