Just as an additional note I'm actually working on the implementation of the Cainite Vampire's and thier clans from White Wolfs World fo Darkness.
It is just a home project as I want to implement the Kindred in some form into my Freedom City game It will include a more basic less frills vampire power, which can then be built upon with Clan, Clan disciplines and so forth, thier will be a few new Vampire feats for it too.
If it works out okay I'll probably do the same with the Garou Tribes from Werewolf the Apocalypse.
Also in the works are some Freedom City "alternatives" versions of some Marvel characters. this will feature the likes of Magneton (the FC version of Magneto), Armageddon (FC version of Apocalypse), Mr Creep (Fc version of Mr Sinister), Wild Thing (FC version of Sabretooth), and so on... these will have similar powers to the mainstream marvel versions (some variations), and completely new write ups of how they came about and fit into the FC universe.