Alucard Sword maybe? Marie's family's heirloom... If it is Trevucard.
Also, if this game has a modern day setting, electronic music could suit it. Something like Batman animated series (2005), Trinity Blood, Hellsing, etc.
It will be like dark rave or ambient, but so far what I've listened to in both trailers are full orchestrations with some hints of electro-bass arpeggios... Maybe that's what it's going to be.
I'm hoping that Maestro Araujo can make some fusion and just plain electronic beats as well.