I wouldn't mind more occults, but zombies i would not be interested in at all.
(Although if necromorphs appear instead, i wouldn't have a problem with it. :tongue:)
Warewolves and fairies are a possibility and considering the connection to vampires, there needs to be a connection there.
Demons much like the original doom game, or even alien demons.
Cybernetically enhanced humans with a cyberpunk theme, based out of a cyberpunk city.
Expansion on Sixam to include a city and habitation, foods, entertainment and the like, the Sixam aliens and other alien visitors.
Superheroes and villains (although i have no interest in this group).