Yeshu: Even the Darkstalkers games used classic tropes for there characters.
Falci: I don't think old tropes are bad in this case. Darkstalkers was its own world, full of familiar things and creatures that weren’t exactly the ones we already knew, and it worked. Omen could have its own thing as well with characters that recall classic monsters and tropes without sticking to those very characters.
A badass vampire inspired by Dracula will not face the same judgment from people as a badass but unfaithful version of Dracula himself.
True, the names have allot of weight to them.
Don't know if there will be a full fledged story mode, but for now the devs seam to take inspirations from classic horror movies. One of the stages has a burning windmill in the background which is a clear reference to the old Frankenstein movie with Boris Karloff.