Late-night talk show comedian Conan O’Brien has joined the cast of Batman: The Dark Knight Returns, Part 2. According to TV Guide, O’Brien will voice Dave Endochrine, a late-night talk show host who interviews the Joker after his release from Arkham Asylum. Seems very fitting. O’Brien joins a start-studded cast which also includes Peter Weller as Batman, Michael Emerson as the Joker, Mark Valley as Superman, Ariel Winter as Robin, David Selby as Gotham City police commissioner James Gordon and Michael McKean as Dr. Wolper, the Joker’s Arkham psychiatrist. Batman: The Dark Knight Returns, Part 2 will be released in early 2013. You can check out the recently released trailer here.