DC's Joker's Real Name

Geoff Johns, Tim Sheridan, Jeremy Adams, Xermánico, Mikel Jann, Romulo Fajardo Jr., Jordie Bellaire, and Rob Leigh wrote Flashpoint Beyond #5. In Flashpoint Beyond #4, Batman/Thomas

Wayne found that the Clockwork Killer was his wife, Martha Wayne, who had become the Flashpoint Joker.

In Flashpoint Beyond #5, Thomas breaks into Arkham Asylum to confront Martha, ending in a brawl.

Martha tells Thomas in a jail that she murdered Psycho-Pirate, who travelled to Flashpoint to escape Dark Crisis. Martha claims she killed him after he explained "how the world was transformed"

Martha claims Psycho-Pirate taught her about the Joker and that Bruce is the mainstream DC Universe's Batman. "The Joker was a guy" Jack Oswald White.

DC has renamed the Joker before. Jack Napier is the Joker in Tim Burton's 1989 Batman picture. Batman: The White Knight and its successors refer to Joker as Jack Napier.

Joker's true name is Arthur Fleck in the 2019 film starring Joaquin Phoenix.
Flashpoint Beyond #5 has covers by Mitch Gerads, Xermánico, Scott Kolins, Howard Porter, and Tomeu Morey

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