So it kind of goes without saying that David Corenswet, Rachel Brosnahan, and Nicholas Hoult will be back after the events of Superman, in theaters July 11. But if you ask them about it, they aren’t so sure.

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.

Catwoman and Harley Quinn are going to be joined by Poison Ivy for Gotham City Sirens: Unfit for Orbit, a five-issue event series featuring an intergalactic nightclub opening up in Gotham City. The owner of the nightclub, Despero, is looking to destroy Earth, and it’s up to Harley Quinn, Catwoman, and Poison Ivy to stop him.