"I've already finished the treatment for the next story in what I'll call the Superman Saga," Gunn told The Hollywood Reporter at the Peacemaker season 2 premiere. "The treatment is done – which means a very, very worked-out treatment. I'm working on that, and hopefully going into production on that not too far away from today."

During a recent interview with Entertainment Weekly, James Gunn confirmed the whereabouts of Margot Robbie’s Harley Quinn “will be revealed down the line” in a future DCU project. During the same interview,

Gunn didn't disclose what the movie would be about or who might be in it, but said it would be going into production soon.