Director David Ayer (Fury, Suicide Squad) and star Margot Robbie will return to the DC Extended Universe with Gotham City Sirens, a movie that will showcase DC’s top female villains, according to The Hollywood Reporter.

Robbie starred as Harley Quinn in this year’s Suicide Squad, the critically panned, but financially successful superhero movie about a government-sanctioned team of supervillains. Her performance was widely praised and plans for a spin-off centered on Harley Quinn and other female characters from the DC stables surfaced even before the movie’s release – it would appear Gotham City Sirens is that project.

The movie bears the name of a recent comic book series featuring popular female characters from Batman’s rogue gallery, including Catwoman, Poison Ivy and Harley Quinn.

The screenplay for Gotham City Sirens will be written by Geneva Robertson-Dworet, who also worked on the scripts for the upcoming Tomb Raider remake and Sherlock Holmes 3. David Ayer will direct and produce, while Robbie will reprise the role of Harley Quinn and executive produce.

No release date has been set yet for Gotham City Sirens.