The mask resembles a horrifying rabbit version of Batman's cowl. The Hatter reveals that what Batman thought was 'the cure' was in fact a hypnotic suggestion that he tricked Batman into taking, then attempts to control Batman with a special mask the Hatter created for him. When Batman injects himself he passes out and wakes in Mad Hatter's lair in Park Row, strapped to a chair and surrounded by various inmates wearing rabbit masks and under the Hatter's control, all a part of the Mad Tea Party. Shortly after Batman rescues Vicki Vale from the Joker's snipers after they crashed her helicopter, Batman gets contacted by Alfred telling him that the cure that Lucius Fox had been working on has just been dropped in to Arkham City ready for him to collect. Tetch's mind control technology would be utilized by Strange to ensure the loyalty of his TYGER special forces. To motivate him further, Strange supplied him with a female assistant with a resemblance to Alice, something Tetch could not resist. Tetch exceeded Strange´s expectations and eventually was asked to use his techniques to manipulate Sharp into finalizing plans for Arkham City. It is revealed in the Arkham Stories that the Hatter was stripped of his beloved hats by Quincy Sharp during his time as warden of Arkham, but Professor Hugo Strange visited the Hatter, gave back his hats and convinced him to continue his research into mind controlling drugs. The Hatter later appeared at Two-Face's trial against the Joker as a juror, nonsensically claiming that Joker was a fop and, assumingly, voting against him. The Mad Hatter is referenced in Batman: Arkham Asylum, in which his biography can be unlocked by scanning a tea set in the Botanical gardens, which is also the answer to the riddle: 'What time is Tea time in Wonderland?' Also, his name appears on the party list held in the possession of Harley Quinn. Biography Batman: Arkham Origins Batman: Arkham Asylum

Batman arkham origins mad hatter