Yep Villa is a Possible Zombie map
For one reason
Do you have notice on kino der toten when you go into the secret room that looks like one of the rooms "FIVE"
It shows a TV and shows some Footage of the Map "Villa"

Same Thing on "FIVE" in some of the spawn Rooms of the zombies on the First floor there will be TV's playing footage of "Villa"


Here's KillerFinland youtube video called "Taking a look at Kino Der Toten"
Pause around 3:40-3:45
and you will see what i am talking about


Thank you for reading