Welcome to Cast Party, the feature that imagines a world with even more live action comic book adaptations than we currently have, and comes up with arguably the best casting suggestions you’re ever going to find for the movies and shows we wish could exist.

This week we’re looking at a movie that we learned just last week is actually getting made, and imagining what it could look like. There's been talk about the idea of some kind of Harley Quinn-centered spinoff ever since Suicide Squad, and it turns out that not only is it happening, but Margot Robbie is an executive producer. David Ayer is returning to direct, and hopefully the final product will be a little a bit more coherent than Suicide Squad. Geneva Robertson-Dworet is on board as a screenwriter, which seems like a good sign.

The project is called Gotham City Sirens, although we don't know for sure yet whether that will be the final title of the movie. Poison Ivy and Catwoman have been discussed as the other central characters, which makes a lot of sense. To fill out my fantasy cast, I've added a bunch of Gotham's female heroes.

While putting the spotlight on the villains is a fine choice, it strikes me as boring to rely on another Batman cameo to represent the heroic side of things, when you could instead establish that this is world filled with strong and fascinating women on both sides of the law.

  • Margot Robbie as Harley Quinn

    DC/Warner Bros

    Obviously this one goes without saying. She was everyone's favorite part of Suicide Squad, and she's why this movie is happening. Hopefully this time around she can finally end her toxic relationship with the Joker and move on to greener pastures, so to speak.

  • Sofia Boutella as Poison Ivy


    Boutella is a gorgeous woman who's making a name for herself in FX-makeup-heavy action roles. Poison Ivy could totally fit into that, with little vines growing through her hair and along her limbs, and maybe even the green skin she sometimes has. Plus I think Boutella will have great chemistry with Robbie, since Ivy really should be this movie's love interest.

  • Penelope Cruz as Catwoman


    I decided to go a different direction with Catwoman than we've seen lately. Cruz is a fantastic actress who can project strength despite her relatively small size. She's also the right age to have believably had a long and thorny romantic history with Affleck's Batman.

  • Natalie Morales as Renee Montoya


    With so many other costumed characters, I think it probably makes the most sense for Montoya to just be a police detective in this story. Although you could also set it up as an origin for the Question. Either way, Morales will be great in the part.

  • Evan Rachel Wood as Batwoman


    Her hair will have to be dyed, of course (nobody's is naturally quite that shade anyway), but Wood otherwise has a great look for Batwoman, and Westworld has shown us how formidable she can be.

  • Bailey De Young as Spoiler


    I never would have thought of De Young as a superhero, but there's no reason Spoiler needs to be tall, and De Young's background in dance will lend itself to an acrobatic fighting style.

  • Fivel Stewart as Orphan


    Stewart has a background in martial arts, which seems essential for Cass Cain. She also has a wonderfully expressive face, which will be important since Cass doesn't talk much.

  • Emma Stone as Batgirl

    DC/Black Label Media

    I'm sticking with my casting from way back in the very first Cast Party. I continue to believe that Stone is a perfect Barbara Gordon, and maybe that movie could be a spin-off of this one.

  • Samira Wiley as the Operator


    If you have Batgirl, you're going to want her right-hand hacker, Frankie Charles. And seriously, Wiley's great! Just put her in all the movies!