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Andy Muschietti emphasizes that The Flash will explore the DC multiverse—a concept that allows multiple versions of heroes to coexist across different timelines and universes. This strategy enables DC to feature various Batmans, including those played by Michael Keaton and Robert Pattinson, alongside Affleck’s.
Muschetti describes Affleck's Batman as having a duality: a commanding, masculine figure complemented by an underlying vulnerability. This depth makes him a compelling character, capable of emotional resonance, especially through his relationship with Barry Allen/Batman (the Flash).