You know there's only been a few Horror themes, so why not a Friday the 13th pin? LOTS of crazy stuff you could do with that. I believe teh Tales from the Crypt and the Freddy machines were both well received back in the day, and the Rob Zombie machine sold out immediately too.... You'd cover the 80's retro thing , plus it'd be edgy and more adult. It's a little ridiculous but you could make it fun.