If you make AoD it will be my first NIB. Well, Spooky might be, if you keep selling them.
Some Ideas for themes (some already mentioned)
The Munsters - But only if the character art is B&W, I hate the colorized versions, must include Dragula car and Rob Zombie Dragula multiball as well as a monster under the staircase (that was munsters, right?)
Gears of War, not spooky but I think it fits a horror theme and M$ is looking for money these days
Lawnmower Man
Of course Goonies.
Scary Movie
Scream
Alice Cooper
DOOM (the game, not the movie)
Creepshow
Steven King - The Shining, The Stand etc
Beetlejuice
Psycho
American Werewolf in London
Willie Wonka and the Chocolate Factory - still creeps me out.
Tremors with Kevin Bacon VO