As Comicbook.com detailed, Luthor and the Joker teamed up in a three-part 1997 episode of Batman: The Animated Series and Superman: The Animated Series. The Joker proposes a deal to Luthor, offering to take down Superman for a substantial price. Ultimately, Superman and Batman team up and stop the dynamic duo of villains.

In fact, the idea of Lex Luthor and the Joker teaming up is the subject of the classic animated movie The Batman/Superman Movie: World's Finest, which marks the first crossover between Superman: The Animated Series and Batman: The Animated Series all the way back in 1997.

James Gunn's Superman may have found its perfect Man of Steel in David Corenswet now, but there was another actor who was almost set to play the Kryptonian hero, and surprisingly, it was Nicholas Houl