Warner Bros. Pictures and DC Entertainment are developing a live-action film pitting Harley Quinn against The Joker.

This project is set within the DCEU and is addition to the Suicide Squad sequel and the in-development Gotham City Sirens which sees Margot Robbie’s Quinn in another feature directed by David Ayer.

The project is described as a spinoff and Geoff Johns is set to produce. No story details or production dates have been set as of yet, but it’s possible we learn more during the Warner Bros. panel at San Diego’s Comic-Con International tomorrow where they kick off the big day in the convention center’s Hall H.