Over the weekend, concept art for "Mad Max: Fury Road" director George Miller's never-filmed DC Comics superhero film "Justice League Mortal" made its way online. Director Ryan Unicomb and producers Aaron Cater and Steven Caldwell are in the planning stages of filming a documentary on "Justice League Mortal," and in order to stir up interest in the project, the doc's official Twitter account released the never-before-seen concept art from early in Miller's production.

Now, comic artist Steve Skroce, who worked on Miller's film, has taken to Facebook to share a storyboarded fight sequence between a rather "Kingdom Come"-looking take on Superman and Wonder Woman.

"It was incredibly fun drawing the DC comics characters which I hadn't had the opportunity to do until then," Skroce posted along with the artwork. "It's Wonder Woman versus Superman ( they have their reasons, mind control!)"