Margot Robbie Is Developing a Third Harley Quinn Spinoff

Last we heard of the Gotham City Sirens adaptation featuring a predominant cast of female DC characters, Harley Quinn actress Margot Robbie was still spearheading the project. Then we heard of a Harley Quinn/Joker standalone with Robbie and Jared Leto reprising their Suicide Squad roles. But recently, Robbie made comments that a third Harley Quinn spinoff is in the works: "I've been working on it for two years now. It's hard to kind of talk about it because all this stuff is under lock and key, ...