The potential return of The Joker in Suicide Squad: Kill the Justice League raises questions about how Rocksteady plans to execute this plot twist. Players familiar with the Arkham games are aware that The Joker is deceased in the Arkhamverse. Following the misuse of the Titan formula in Batman: Arkham Asylum, Joker succumbed to a terminal illness, concluding his life at the conclusion of Batman: Arkham City. Although Joker makes appearances in Batman: Arkham Knight, it is in the form of hallucinations.