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Official Site: Warner Bros

The Arkham Knight is an identity used by two fictional supervillain appearing in DC Comics media. The original was created by Rocksteady Studios and DC writer Geoff Johns to serve as the titular villain in the 2015 video game Batman: Arkham Knight. He made his first appearance in the prequel comic book Batman: Arkham Knight #1 (February 2015) and received his own 6-issue miniseries Batman: Arkham Knight GENESIS, with #1 released on August 26, 2015. He is voiced by Troy Baker. Depicted as the mysterious commander of a vast militia of mercenaries, the Arkham Knight harbors a deep-rooted grudge against Batman and fully intends to kill the vigilante after making him suffer. To this end, he allies himself with the Scarecrow and provides a military presence in the evacuated Gotham City during the events of Batman: Arkham Knight. Towards the end of the game's main story, his true identity is revealed to be Jason Todd, adapted from a pre-existing character in the comics who acted as the former and second Robin. In the game's universe, Todd was thought to have been killed years earlier by Batman's nemesis the Joker.

The Arkham Knight persona later crossed over into the comics in Detective Comics #1000, created by Peter Tomasi and Doug Mahnke. In the DC Comics Universe, the Arkham Knight is depicted as a wholly original character named Astrid Arkham, with no direct relation to Jason Todd, who is the Red Hood in this medium. Raised within the Arkham insane asylum by the inmates, she grew up viewing many of Gotham City's criminals as innocent victims of Batman, who she blamed for her mother's death. She becomes the Arkham Knight to end his vigilante career by force.

In an interview with Newsarama, when asked if the Arkham Knight was either an entirely new character or simply new to the Batman: Arkham series, Rocksteady Studios developer Dax Ginn responded with, "Completely original. Batman has not encountered him before, so this is a completely original design and role that the Arkham Knight brings." In another interview, Ginn described the opportunity to create an original character in the Batman universe as "terrifying", but that developers at the studio were relishing the chance to hopefully make a mark on the Batman property that lasts beyond the tale of the games themselves.

Speaking with Game Informer, Batman: Arkham Knight director Sefton Hill explained that, "[Rocksteady] wanted to introduce someone who could really challenge Batman to go head to head with him in lots of different ways."

Arkham Knight has not been a contender in any CBUB matches.