Superman isn’t evil in Injustice, and that’s the whole point. Superman in Injustice is the dream for alot of people: they want to be so epically powerful, that no system can wield power over them, but they can make the lives of other people better. The problem is, when someone becomes that powerful, and exercises what…

He’s not really evil, he just has a messed up moral compass. He believes he’s doing what is best for everyone, but it’s all spiraling out of control because he’s trying to manage everything.