I'm liking the Terminator versus Dracula idea. Conceptually, very sound.
And it'd cetainly be more enjoyable than the most recent Terminator movie. The priest-Terminator idea would be just ideal for Arnie-esque one-liners, too:
"You shouldn't have made me cross."
"I'll be Drac."
etc. :help:
I saw a short film - ten minutes or so - recently. Batman is fighting the Joker in an alleyway, when suddenly the Joker is attacked and killed by aliens from Aliens. Batman's then fighting for his life against the aliens, when these Predator's in cool red armour arrive, kill the aliens, then attack Batman.
It may have been the stupidest, sexiest piece of cinema I've ever seen.