How Do You Say Vampire In Thu’um

Skyrim has released it’s trailer for their first Expansion called Dawnguard (as I realize I still haven’t beat Skyrim). Looks like a vampire brotherhood has started and you can either join or rebel the cause. Chances of their being a vampire dragon? Probably not likely, but if there is then count me in. Just as long as I don’t have to fight another frost troll then I’m good. Side question, which is worse the frost trolls from Skyrim or Deathclaws from the fallout series?