Although physical DVDs and Blu-rays won’t be hitting store shelves until January 29, Amazon already has Batman: The Dark Knight Returns, Part 2 available for digital download (thanks to ‘JD’ for the heads up). You can purchase the full-length film by clicking here.

With Gotham City back under his watchful eye, and accompanied by able sidekick Robin, Batman continues to battle crime  but his resurgence awakens a far worse evil at Arkham Asylum: The Joker. In the meantime, Superman has been dispatched by the President to halt Batmans unsanctioned reign by whatever means necessary. Between the Jokers diabolical scheme to drag Batman to the darkest levels of insanity, and the Man of Steels seemingly invincible physical presence, the Dark Knight must confront adversaries and allies simultaneously while maintaining the peace in Gotham City.

Primetime television stars Michael Emerson (“Person of Interest”, “Lost”) and Mark Valley (“Human Target,” “Fringe”) join the voice cast as The Joker and Superman, respectively; and popular talk show host Conan OBrien gives voice to animated talk show host Dave Endochrine. Fanboy favorite Peter Weller (RoboCop, “Dexter”) continues as Bruce Wayne/Batman, and he is once again accompanied by David Selby (The Social Network, Dark Shadows) as Commissioner Gordon, Ariel Winter (“Modern Family”) as Carrie/Robin, and Michael McKean (This is Spinal Tap) as Dr. Bartholomew Wolper. Also featured in the voice cast is Maria Canals-Barrrera (“Wizards of Waverly Place”) as new Commissioner Yindel, Paget Brewster (“Criminal Minds”) as Lana Lang, and Radio Hall of Fame member Michael Jackson as Alfred.

UPDATE: It looks like Amazon has removed the digital download option for now.