I love playing Santa's workshop and killing the snow men and elf's and gingerbread men, I know the zeds also have more skins along with scarry clowns, in one map, I would love to be able to zed skin vote, at the same time voting or selection off a new map, I would even pay for other zed skins,
mythical creature like ,
Yeti
Leprechaun
Imp
Ghoul
Pixie
Troll
Kappa
Medusa
Minataur

Animals in human form look scary and cool as ....
a nice zoo overgrown map would fit this good

Egyptian god's would be other cool ones
a nice Egyptian map would fit this pretty good

aliens is a major factor that would go down well