An Arkham Asylum HBO Max show that serves as a spinoff of The Batman is in development, and it could pay off an idea from Ben Affleck’s canceled Batman movie. Even before Matt Reeves’ Batman reboot hit theaters, spinoffs set in the world of The Batman were already being discussed by Warner Bros. and HBO Max. On top of the Arkham Asylum-focused show, a Penguin spinoff series, The Penguin, is also happening.
Before Matt Reeves was given the opportunity to create a brand new iteration of Batman that would reboot the franchise, Ben Affleck was attached to not only star in but also direct a Batman film. While Affleck’s Batman movie never came to be, pieces of information on what the story was going to be about and what characters it would feature have then surfaced. Joe Manganiello’s Deathstroke, who appeared briefly in Justice League and in the Snyder Cut Knightmare timeline, was going to be the main villain, and Batgirl would also show up. More than those characters, the most exciting thing about Ben Affleck’s Batman film is that it would have been a psychological thriller set in Arkham Asylum.
Related: Affleck's Batman Was DC's Smartest (& Batman V Superman Proved It)
Although in a very different context, The Batman’s Arkham Asylum spinoff can dive into that same idea. In fact, Matt Reeves has mentioned that the show will lean into the horror aspects of Arkham Asylum and how such a peculiar place could change after the events of The Batman. That is very similar to how Ben Affleck’s Batman solo film would have explored Arkham, something that other iterations of the Caped Crusader, such as Nolan’s Dark Knight trilogy, have not done yet. The biggest difference between Ben Affleck’s unmade Batman movie and Reeves’ upcoming
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