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  • Nightmare Batman is the father of Nightmare Robin.
  • The Nightmare Batman statue, which is $125, was officially released in September 2013.
  • Nightmare Batman's joke is a reference to vampires' reaction to sunlight in The Twilight Saga.
  • Nightmare Batman was originally classified as an assassin.
  • Nightmare Batman is possibly inspired by the League of Legends champion Warwick, who is similar in theme, role, passive and ultimate.
  • Some of Nightmare Batman's quotes are actually borrowed from the Batman: Vampire trilogy.