First Skyrim DLC

Bethesda announce the release of the first DLC package for Skyrim this Summer, titled Dawnguard, which will be only available for the Xbox 360 console until further announcements. Bethesda previously signed an exclusivity deal with Microsoft for Skyrim DLCs, yet it was on a 30 day window only, leading us to believe that this DLC will be available for the PC and PS3 platform late this Summer. Bethesda failed to detail anything about this DLC other than providing the image below.