User blog comment:Jimeee/Skryim DLC Details Leaked in 1.5.26 Update Files - The Snow Prince!?/@comment-1870265-20120430022803/@comment-4889460-20120502143740

Although it's already been used as extra content for a previous game, so that would be lame of them to use that. (Plus it would be just too much like the landscape in Skyrim)