Now that I've actively seen clips, though, I think a suspicion I've had for some time seems to be highly plausible.
I feel like this may ultimately be akin to Underworld or Van Helsing.
Bloody load of fun to watch, some nice B-action full of Rule of Cool attacks, some surprisingly solid acting for the tone of the piece, and all around a great hammy time...just don't think into the logistics of it all too much.