Rocksteady sent out a tweet this morning regarding the recent rumors surronding a Harley Quinn DLC pack and which retailers it would be exclusive to. It turns out, it isn't exclusive to anyone. By pre-ordering the game at any retailer, you will get a Harley Quinn DLC pack that will allow you to play as her in a specific story pack.
In other Arkham Knight news, Arkhamverse.com has reported that the game may be coming as soon as January 2015 with some comments that were made by Kevin Conroy recently in an interview.
As for now, know that Batman: Arkham Knight is scheduled to release in 2015 with an undetermined release date.
Posted by Dustin Fritschel