The Fantastic Four: First Steps is due to arrive Sept. 23 on digital and Oct. 14 on Blu-ray. ADVERTISEMENTFirst Steps takes its inspiration from a team of superheroes introduced in Marvel Comics, and is the third iteration in the movie franchise. The movie earned some $118 million at the box office opening weekend, outpacing all other films. Marvel has yet to officially confirm a First Steps sequel.