The more I think about it, Zombieland could very well run into the same issue as TWD. With those IP's, we know the respective ones more for the human characters rather than the zombies.
But with the scares of the SZ's, it's gotta' be the zombies. An even if the SZ can use the human characters of Zombieland, that's a main cast of...4 humans. (Maybe five if we can get a certain look a like, unless they do a zombie form of him.)
I can imagine they'll project the rules of survival on the buildings, and maybe have stages with various zombie kills of the week, but I don't think that's gonna' be enough.
As for a Rob Zombie zone, well if you use characters from his various movies, you've got a collection of sick freaks inspired by 70's exploitation/grindhouse films. An if you take characters/imagery from his music, and you've got a smorgasbord of horror, sci-fi and grindhouse. All of which you can work with in some fashion, so it's got that going for it.