Some day someone is going to make a really great book or documentary about Justice League: Mortal, the live-action Justice League movie Warner Bros. almost made in the late 2000s. The film was going to be directed by George Miller, the man behind the Mad Max franchise. And if a Justice League movie with action by the guy who did Fury Road doesn’t sound enticing to you, I don’t know what to say. Miller’s cast included D.J. Cotrona as Superman, Armie Hammer as Batman, Megan Gale as Wonder Woman, Adam Brody as the Flash, Common as Green Lantern, and, in the role of Martian Manhunter, Miller’s fre…