It seems like another facet of the first-person shooter war has reared its ugly head today when Sony and EA revealed that expansions for Battlefield 3 will arrive one week earlier on the PS3. Microsoft and Activision already have a similar deal granting Xbox users early access to Call of Duty downloadable content. Back to Karkand is the first Battlefield add-on and will include four updated Battlefield 2 maps. The DLC comes free with an in-box coupon for early adopters of Battlefield 3, though it may not be available for immediate download. Having trouble waiting to get your battle on? The Battlefield 3 beta is launching in one week!