Personally I loved Man of Steel, Batman VS. Superman, and especially Wonder Woman(still pissed it didn't even get one Oscar nomination. I mean the Batman Arkham franchise is incredible and easily the best Batman games of all time. Superman and Wonder Woman practically write themselves. You could start out with Jor-El fighting to make sure Kal-El escapes the doomed planet. Then you could have many years of Clark learning his skills until he is the Man of Steel. With Wonder Woman same thing. Show the battle between Zeus and Aries, and train Diana until she is badass!. All the content is there, what are you waiting for?