Sounds a little bit like Rosario to Vampire meets Soul Eater genderswap, doesn't it? (Oh, Stein-sensei!)
Now, not much is known about the film's plot, but I'm hoping that Vampires vs, um, Frankensteins (?) are the new Pirates vs Ninjas. Personally, I'm on the side of the vampires 'cause they're usually sexier and smarter...then again, this is Japan and we do know the Frankenstein is a girl, so I'm willing to bet she'll be sexy and/or cute.
How about you? Vampires or Frankensteins?