Good premise, but I agree that the story feels a bit lacking.
Though I do like what they did with the lead werewolf guy (name escapes me at the moment) I liked his actor.
Second movie isn't worth **** IMO.
Also, they were sued by white wolf over this story, though why I don't know. White Wolf does not own the rights to a vampire/werewolf struggle.
Also comeon: One brother was bit by a wolf, and one by a vampire, and THAT'S the origin? Bullshit. I call utter bullshit.