They haven't released all Info, I guarantee you dawnguard wi have their own badass things to make them appealing
They've already said what is supposed to make the Dawnguard awesome. Armored Trolls, different weapon options, etc. I'm sure they'll get a fancy shout or two, as I think there are more than just the one shout being added in? At any rate, I'm fine with whatever they have. I admit, it would be pretty cool if they could turn into some angelic creature, but at the same time it's the good vs. evil thing. Monster vs. Man. Hell, spice things up be a werewolf and turn it into the cliche Werewolf vs. Vampire.
