Writer/director Todd Phillips took to Instagram to share the cover page of Joker 2, which he co-wrote with Joker collaborator Scott Silver. Phillips also shared a photo of star Joaquin Phoenix reading its pages.

The title for the sequel is Joker: Folie à deux, with the subtitle translating as either “folly of two” or “madness shared by two.” It’s a reference to a medical term for a mental disorder shared by two people, or a shared delusional disorder–or possibly hallucinations transmitted from one individual to another. All of which, within the context of the Oscar-winning 2019 film, could refer to how Arthur Fleck’s chaotic villainy is embraced by Gotham City in the first film. Or, it could also refer to Joker meeting Phillips’ version of Harley Quinn. Or even Batman, perhaps. Who can say?