The Batman Superman Movie: World's Finest (1997)

Joker, short on money for his criminal endeavors, strikes a deal with Lex Luthor to kill Superman. Batman tracks Joker to Metropolis and alerts Superman to the Joker's plan. After initial distrust of each other, the World's Finest team up to thwart the villains by night. By day, Bruce Wayne and Clark Kent clash over the attention of Lois Lane.