This notification pertains to anyone who pre-ordered and picked up their Batman: Arkham City game for Xbox 360.
We are aware that the exclusive Robin code included in the package is currently not working. PLEASE DO NO DISCARD IT. We are working with Microsoft to fix this issue and should have it resolved shortly. When the fix is in place, those same codes will correctly download your DLC.
Thank you for your patience in the meantime.
UPDATE 12:48 PM: It sounds like Microsoft should have it fixed within a few hours.
UPDATE 1:37 PM: Receiving reports of the code working for some.
UPDATE 1:44 PM: Confirmed by business teams. Codes should be fully functional now.