In JLA: The Nail, the Joker is provided with Kryptonian gauntlets and launches an attack on Arkham Asylum, forcing most of the inmates to fight each other before brutally murdering Batgirl and Robin while forcing Batman to watch.
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Batman — in this version, the grandson of Commissioner James Gordon — stops the virus with help from another A.I.: the Batcomputer, as programmed by the long-dead Bruce Wayne.
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