The Battlefield Blog outlines further improvements rolled out in Battlefield 3, as DICE has made further progress on squad functionality, default server region settings, and stability in the military shooter sequel. The blog also says the Back to Karkand, DLC will be released in December, free for preorder customers, and $14.99 USD/1200 MS points for everyone else, and we have a new teaser trailer showing gameplay on the updated versions of the classic maps Strike at Karkand, Sharqi Peninsula, Gulf of Oman, and Wake Island it will offer.