User blog comment:Blood Reaper/Skyrim Dawnguard Trailer/@comment-4353017-20120531190511/@comment-68.227.12.98-20120531233219

I believe that if they add new skill tress they may add a one time respec for your character. Like after choosing to side with the vampire you're "born again" or in the Dawnguard they get initiated and in sequence have to be "retaught" what they know.