Will Mark Hamill voice Joker if Kevin Conroy isn't Batman?

In November of this past year, the world lost actor Kevin Conroy to cancer. Since the early 1990s, Conroy was (and continues to be) known as the quintessential voice of Bruce Wayne/Batman across the realms of television, film, and gaming. With his favorite iteration of the Caped Crusader gone from this world, however, Mark Hamill believes that it's time to retire as Joker.

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Mark Hamill Indicates He Is Through Playing The Joker Without