Yesterday's reveal trailer for Batman: Arkham Knight showed off the opportunity to play as Harley Quinn as part of a pre-order bonus. Now, Walmart is promoting an in-game prototype Batmobile that comes with "exclusive gameplay features" when you pre-order.
BATMAN: ARKHAM KNIGHT
Release: October 14, 2014
Developer: Rocksteady Studios
Publisher: Warner Bros. Interactive Entertainment
Platform: PS4, Xbox One, PC
Plot: In the explosive finale to the Arkham series, Batman faces the ultimate threat against the city he is sworn to protect. The Scarecrow returns to unite an impressive roster of super villains, including Penguin, Two-Face and Harley Quinn, to destroy The Dark Knight forever.