Before Raziel was sacrificed in LoK, he looked very slightly like Vincent - pale skin, long dark hair and a brooding look. Probably because he was a vampire. However, he only looks that way in the very beginning of the intro FMV. I've seen that much in the demo.

Most people feel that the overall 'look' of Dirge of Cerberus is very similar to Devil May Cry, though I've never played that one.
Unlike Legacy of Kain, it looks like DoC won't be an over-the-shoulder style game. Third person, certainly, but with semi-fixed camera angles instead of watching everything from directly over Vincent's shoulder.

Anyone else notice that Vincent seems to be standing on the skeleton of a three-headed dog - i.e; Cerberus - in Kishi's picture?