A BethSoft forum user has discovered some interesting files within the latest Skyrim 1.5.26 patch files, that reveal a number of new things are on their way in a possible DLC to be released by Bethesda. The discovered files include references to a number of new characters and items including Snow Elves, a Snow Elf Prince and Crossbows, together with new vampire feeding animations.
For example, note the DLC01 reference:
A post within the comments states, in reaction to the findings, Bethesda PR and marketing vice president Pete Hines says that we may be get a first glimpse of the official DLC pack for Skyrim soon. Hines currently “working on getting a little more info out” for next week, but it’s not a sure thing. “We’ll see,” he says. So as soon as more information comes our way we will be sure to keep you updated.