Back in December, Warner Bros. confirmed thatMargot Robbiewill reprise herHarley Quinnrole fromSuicide Squadin a new superhero spin-offGotham City Sirens, withSuicide SquaddirectorDavid Ayerreturning to the helm. The movie will also feature other iconic DC Comics characters such as Poison Ivy and Catwoman, although those characters have not yet been cast. Since then, there have been no shortage of casting rumors for these coveted roles, and this weekend another potential candidate emerged,Haley Bennett, who teased her potential casting as Catwoman on social media.

The actress took to herInstagramrecently to reveal a photo from the DC Comics of Catwoman, leading fans to speculate if she has been cast in this role or not. The actress wouldn’t address the issue any further on social media, and it remains unclear when the studio will cast the Catwoman and Poison Ivy roles. There have been rumors thatMegan Foxwas being sought to play Poison Ivy, with an unconfirmed report claiming that the actress has been ordered a number of comic books online, which indicated that she was doing research for the Poison Ivy role. Still, there has been no confirmation of this casting yet.

Artist BossLogic recently revealed artwork that showcased whatEmma Stonewould look like as Poison Ivy, and whatEliza Dushkuwould look like as Catwoman. Neither of these actresses have been confirmed to be in contention for their respective roles, but another possible candidate recently emerged on social media as well.Mr. RobotstarStephanie Corneliussenalso recently teased that she wants to play Poison Ivy, but it isn’t clear if she has actually met for the role in any official capacity.

Margot Robbieessentially willedGotham City Sirensinto existence all on her own. After she landed the role of Harley Quinn inSuicide Squad, the actress reportedly did a deep dive into the comics to research her character, and during that process, she became interested in many of the otherDC female characterswho are showcased in the Comics. She brought on an unidentified writer herself to develop the project, before taking the project to Warner Bros. The studio then quickly picked up the project.Gotham City Sirenswas a recentDC Comicstitle that focused on the trio of Harley Quinn, Catwoman and Poison Ivy working as a team to do their own bidding. It sounds like this new movie will be taking its cues from that book.

Suicide Squadwas not exactly the most well-received movie of the summer, especially by critics. The movie currently holds a pretty abysmal 26 percent approval rating on Rotten Tomatoes. With that said,Margot Robbiewas met with a whole lot of praise for her portrayal as the Joker’s main lady Harley Quinn and was seen as one of the most redeeming qualities of the movie. Despite the poor critical reception,Suicide Squadwent on to gross $745 million at the box office, so Warner Bros. has a lot of reason to believeGotham City Sirenscan work.Haley Bennettmost recently starred inThe Magnificent Seven,The Girl On the TrainandRules Don’t Apply. Take a look at her Instagram photos below as we wait for more official details onGotham City Sirens.