“Joker: Folie à Deux” picks up with Arthur Fleck ( Joaquin Phoenix ), institutionalized at Arkham Asylum, awaiting trial for his violent crimes. As he grapples with his fractured identity, Arthur finds love with fellow inmate Lee (Gaga) and begins embracing the music that has always played inside his chaotic mind.

Folie à Deux,” Lady Gaga will introduce audiences to Lee Quinzel, her version of the Joker’s love interest Harley Quinn from the DC comic books.

Let's get the elephant-in-clown-makeup in the room out of the way first: Arthur dies at the end of Joker: Folie a Deux, meaning a third movie following the titular clown is very unlikely, if not impossible (unless they decide to go full surreal dream sequence on his deathbed, or a similarly 'out there' premise).