When the trailer said, "Our Brightest Hope" and then Gabriel takes out a pocketwatch like device that summons Siberian Wolf and then cues to "Or our Darkest Nightmare" with him sucking blood; I think of it as that they may have a multiple ending decision making plot, which would be pretty cool.
If you're good guy Gabula, you are redeemed by giving free wolf pups to everyone...
If you're being Dracula, then you will succeed in bringing the world into chaos...and then Alucard mode, maybe... Julius? DoS anybody?...