Back in March Rocksteady announced the pre-order bonus DLCFor Batman: Arkham Knight featuring Harley Quinn now it has a new ad for the DLC which has appeared on GameStop and is slightly different. It features a different image of Harley, and the DLC has been renamed to “Harley Quinn Story Pack.
Batman: Arkham Knight was expected to come out Fall 2014 but has since been delayed to 2015, the game will be released on PC, Xbox One and Playstation 4. Source Dualshockers