Home News Batman: Arkham Asylum Hamill and Conroy to voice Arkham Asylum News by Patrick Garratt Founder & Publisher (Former) Published on Dec. 17, 2008 Follow Batman: Arkham Asylum Mark "Skywalker" Hamill and Kevin Conroy will lend their voices to Batman: Arkham Asylum, Eidos announced today. Conroy, obviously, is the man himself. Hamill's the Joker. PC, PS3 and 360 next summer.