A Skyrim fan going by the handle of Kerellan has been poking around the Skyrim patch 1.5.26 update file, and has posted his findings regarding a “DLCO1” on the Bethesda forum.
According to Kerellan he found mention of Snow Elves, a Snow Elf prince, crossbows, new vampire feeding animations, and something prefixed “RF”, in the update file!
From The Elder Scrolls Wiki:
Not much is known of their origins, it is possible they were a hybrid of other Elven races.”
The Snow Elf statue of Irkngthand.
Gelatinous Dude recalls the large statue depicting a Snow Elf in the Dwemer ruins of Irkngthand, supposedly the only known visual representation of a Snow Elf in Skyrim..