Suicide Squad standout Margot Robbie wasn’t the only one to become enamored with the idea of a spinoff featuring the colorful villainess Harley Quinn. Apparently, it also won over director David Ayer. He has decided to team up with Robbie again for the project, according to The Hollywood Reporter .

Called Gotham City Sirens, the film will center on a group of female DC characters. Although we can’t say for sure yet which ones will join Harley Quinn in the movie, the recent comic series also featured Catwoman and Poison Ivy. The screenplay is reportedly in the works, with screenwriter Geneva Robertson-Dworet (Sherlock Holmes 3) doing the job.

Robbie has been said to be a major driver of the project, which was previously confirmed by THR and she will also serve as a producer under her LuckyChap Entertainment production company. THR’s sources revealed that the actress became invested in DC’s female characters while delving into her role and evidently saw the potential for another film. She found a writer herself and brought the project to the studio.

Quinn was originally introduced in the Batman: The Animated Series television show as the Joker’s girlfriend and sidekick, but the quirky character became a fan favorite and eventually made the leap into the DC Comics canon. Meanwhile, both Catwoman and Poison Ivy are familiar to fans as well, with the former sometimes appearing as Batman’s love interest and the latter stirring up trouble for him with toxic plants. The characters are by no means traditional, but if Deadpool proved anything when it opened in February, it’s that audiences don’t just want the same old superheroes.

Suicide Squad may have been met with mixed reviews, but given how Harley Quinn stole the show, we have high hopes for Gotham City Sirens.

Article originally published in September 2016. Updated on 12-14-16 by Stephanie Topacio Long: Added the film’s title and David Ayer and Geneva Robertson-Dworet’s involvement in the project.