Bethesda has just announced the expansion pack for Skyrim, calling it Dawnguard. Details are next to nonexistent, but the company states that it is coming this summer, and that it's exclusive to the Xbox 360.
The announcement was made with a picture of the Nord protagonist seen in most official Skyrim art.
That the expansion pack will be exclusive to Xbox 360 owners shouldn't come as too much of a surprise given the company's previous timed exclusives with Fallout 3 and Fallout: New Vegas. I just hope that the exclusive doesn't last longer than a month or two.
Bethesda will provide more details about the expansion pack at E3.