Batman: Arkham Knight is all set to launch on June 23 for PC, PS4 and Xbox One.
The official YouTube channel for the game has just released a new trailer that shows of the Harley Quinn pre-order DLC. The DLC is set before the events of the main game. The featured trailer shows off how the gameplay for the DLC will look. The pre-order bonus story mission DLC features Harley infiltrating the Blüdhaven Police Department to rescue Poison Ivy, and beating the cops to a pulp using her quick moves and a baseball bat.