Gotham City Sirens (film)

Gotham City Sirens is an imagined film set in the DC Cinematic Universe and serves as a sequel to both Catwoman: Relentless and Harley Quinn. It is a team-up movie featuring Harley Quinn, Catwoman, and Poison Ivy taking down Penguin.

Plot

 * Catwoman and Poison Ivy have become friends after the events of Catwoman: Relentless and live in Ivy's lair. Harley Quinn, still on the run since The Suicide Squad 2, comes to the lair (as she is one of the few trusting friends with Poison Ivy) and sees Catwoman, whom she has a little rough history with from Harley Quinn. Catwoman and Harley fight before Ivy breaks it up. Harley wants help to take down Penguin after what he did to her in Harley Quinn.
 * Additionally, the GCPD is focusing on capturing Catwoman and Poison Ivy, after the destruction they caused in Catwoman: Relentless. It is revealed in the Iceberg Lounge that The Penguin and Commissioner DeCarlo have an agreement to destroy the competition on Gotham's underground. This is shown when Great White Shark's gang comes in to attack, but are taken down by Penguin's crew, including Jay, Raven, and Lark.
 * The sirens go to Coco, a recurring villain in the Catwoman film series, who tells them that The Penguin's operations front as the Iceberg Lounge. The trio arrive and take down The Penguin. They then decide to go back to chilling in Ivy's lair.

Cast

 * Margot Robbie as Harley Quinn
 * Vanessa Hudgens as Selina Kyle/Catwoman
 * Megan Fox as Pamela Isley/Poison Ivy
 * Danny DeVito as Oswald Cobblepot/The Penguin
 * Tim Curry as Commissioner Roger DeCarlo
 * Hayden Penettiere as Holly Robinson
 * Marg Helgenberger as Maggie Sawyer
 * Dana Delaney as Sarah Essen
 * Common as Great White Shark

Future
A sequel is in development, which will feature Hush.