Just last week, we brought you the first clip from Warner Premiere, DC Entertainment and Warner Bros. Animation‘s forthcoming DVD and Blu-ray release of Batman: Year One, based on the classic Frank Miller comic.

At the time, we told you that Warner Premiere would be debuting a look at the Catwoman short included on the Batman: Year One Blu-ray, along with a peek at the next DCU animated film, Justice League: Doom. Now, TV Guide reports that Warner has announced the cast of voice actors taking part in the new Justice League animated movie.

An all-star cast has been assembled to provide voices for the iconic team of superheroes in Justice League: Doom, the latest animated DVD-movie in Warner Home Video‘s series of DC Comics adaptations. Castle star Nathan Fillion will reprise the role of Green Lantern, which he first played in Green Lantern: Emerald Knights. He’ll be joined by Tim Daly and Kevin Conroy, the longtime voices for Superman and Batman, respectively. Rounding out the cast are several of Conroy’s old costars from Cartoon Network’s 2001-06 Justice League series (known as Justice League Unlimited in later seasons): Smallville‘s Michael Rosenbaum as the Flash, Alias alum Carl Lumbly as Martian Manhunter and veteran voice actress Susan Eisenberg as Wonder Woman. Cyborg, a character not seen on Justice League, joins the group for this movie and will be played by Bumper Robinson (The Game).

Justice League: Doom, the last script written by Dwayne McDuffie (All-Star Superman, Justice League: Crisis on Two Earths), who passed away back in February, is based on Mark Waid‘s story “Tower of Babel“, Batman’s secret files on how to defeat each member of the league has been stolen. Not only does the league have to deal with special attacks, but also the betrayal of their teammate and friend.

Justice League: Doom, executive produced by Bruce Timm, and directed by Lauren Montgomery is slated to hit store shelves in early 2012.