The film is set in the universe of the Batman: Arkham video game franchise, occurring after Arkham Origins; Jay Oliva states it takes place about two years before Arkham Asylum. The story focuses primarily on the Suicide Squad, particularly Batman villains Deadshot and Harley Quinn with Batman in a supporting role. In the film, a Suicide Squad of six criminals is dispatched by Amanda Waller to break into Arkham Asylum, where they must contend with the asylum 's inmates and Batman as they attempt to complete their mission. The film stars Kevin Conroy as Batman / Bruce Wayne (reprising his role as Batman from the DC animated universe, among other numerous DC properties, including the Arkham series), Neal McDonough as Deadshot / Floyd Lawton, Hynden Walch as Harley Quinn / Dr. Harleen Quinzel (who reprises her role from The Batman) and Matthew Gray Gubler as Riddler / Edward Nygma. In addition, Troy Baker, C.C.H. Pounder, Nolan North, and Martin Jarvis reprise their roles of Joker, Amanda Waller, Penguin / Oswald Cobblepot and Alfred Pennyworth from Arkham Origins (with North and Jarvis also appearing in Arkham City), while Jennifer Hale reprises her role of Killer Frost from the DCAU and other properties.
who did matthew gray gubler play in batman assault on arkham
Riddler / Edward Nygma