User blog comment:Blood Reaper/Skyrim Dawnguard Trailer/@comment-99.103.218.235-20120601040632/@comment-99.103.218.235-20120601044611

to twilightdragongod: hints about the snow prince being in the expansion were found in the latest patch. considering that there was also info on vampires and crossbows (which you can easily see are in the expansion) in the patch as well, there's a good chance that the snow prince will have some presence in the expansion as well. example: there were many things like 'crossbow action move right, crossbow action move left, etc' and also 'snow prince dialog A, snow prince dialog B, etc.'

its probably easier to just read here: http://www.kotaku.com.au/2012/04/skyrim-patch-files-hint-at-an-incoming-snow-elf-prince-and-crossbows/

may not be THE snow prince like the poster said, but its definitely talking about a snow elf prince