While we have known that other retailers would have specific pre order bonuses, we had no clue who or what they would be. We now know that an Arkham City pack will be the pre order incentive at Wal-Mart.
While we don’t have a look at the skins just yet we can assume that they will look something similar to what they looked like in the game they are based off of. You can see the looks from Arkham City below and when we get actual pictures of the costumes from Injustice Gods Among Us we will update this post.
Walmart has updated their website with pictures of the skins and the fact that you get MK vs DC for free when you preorder. http://www.walmart.com/ip/Injustice-Xbox-360-W-Walmart-Exclusive-Bonus-Mortal-Kombat-Vs.-Dc-Universe-And-Batman-Arkham-City-Skins-Pack/23325289