I found this its quite interesting
What an excellent article, with good lore based ideas. The whole idea of Solstheim and the Snow Prince makes sense and sounds good. Also as a side note the return of snow elves on Solstheim could also lead for a future expansion into Morrowind, all in all a great article and hopefully some ideas that are right
So some Snow Elfs escaped ,and then turned into vampires. Then the Thalmor resurrected the Snow Elf prince who turned into a vampire himself ,and he uses his comsmic staff/spear to turn every Thalmor into zombie so he would take back Skyrim with his zombie army! No , nope, I can't see that theory ever happening but I promise to make an official appology if it turns out to be true. I believe it's going to be something much more simple than the Vampire-Falmer-Snow Elf- Thalmor conspirasy.
spoilers bellow possibly
i read a forum thread about content found in one of the skyrim game data updates. it involved snow elf animations, crossbow animations, and dialogue options for the snow elf prince...
i posted the link in another post about the DLC, i can try find it again if people would like,