I've finished the main quest in Dawnguard, thoroughly explored the Hidden Vale ect. I'm pretty sure I've seen all the new stuff. But there were a couple of things in the trailer that I seem to recall that I may have missed, and I can't watch it right now because I'm down to my last few megs of data and I'll lose my high speed connection if I go over it.

I recall some kind of giant kind of thing bursing out from some ice ( don't think it was the docile frost giants in the Vale). Where was that? And a female Dawnguard with a crossbow shot what looked like a zombie, what I took to be maybe a ghoul (a vampire slave), and a bow that had a distinc jagged appearance to the shaft.

Was any of that in there? I can't wait until the end of the month when my data is reset.

Bursting out of the ice?

You mean the dragon twins?

I just watched the trailer...
That would be one of the dragons you fight on the frozen lake. They can dive in and out of the ice.
You also see a Gargoyle burst out of its rock form.

There's a female using a crossbow, but you can't see what she's shooting.
There doesn't seem to be any "ghouls" or "zombies" in the trailer. Just vamps and gargoyles.

I think that might be the Dragonbone Bow. (I never crafted one, so not sure) But it's definitely using a Dragonbone arrow.

Dragonbone weapons!
One of the great things Dawnguard added...
(Plus arrow crafting as well.)
I thought Dawnguard was epic.
Very well done.

Oh well, so no giant frost trolls?

Thanks guys.

If you've collected the paragons, then yes, you've killed the frost troll...giant...things. I blame Gunmar. Only he would be sick enough to lock a giant and a troll in a closet.