This is purely for entertainment. It is a DC Comic story arch that follows the events after Joker cuts his face off and disappears town for a year. He comes back to terrorize Jim Gordan at the police department to retrieve his face. And many of the Bat family are in for it. Because joker has claimed he knows who every one's secret identity is that's all I'm going to say about the story but I will believe this will make for a great movie. And comic fans and more will love it all together.