Fan Casting The Batman/Superman Movie: World's Finest

It depicts the first meeting of Batman and Superman, when Batman comes to Metropolis in pursuit of the Joker, who has offered to kill Superman for Lex Luthor. Superman finds himself out of his depth when matched against the Joker's cunning and unpredictability, while Batman has trouble with the resources Luthor provides the Joker with. Both heroes must agree to overcome their differences to put a stop to the Joker and Luthor.