The latest Marvel tentpole dropped 66 percent from its premiere, portending bad news for the comics giant.Key PointsThe Fantastic Four: First Steps scored another No. 1 at the domestic box office.Two premieres took the No.

Marvel’s first family stumbled in theaters in its second weekend, but still held on to the top spot at the box office.

Marvel’s First Family might not save the day after all. “The Fantastic Four: First Steps” is quickly losing steam in its second weekend, signaling the comic book adventure isn’t connecting at the box office beyond the film’s core demographic of superhero fans.