Agreed with the sentiment that a "timeless" horror theme is preferable. Zombies are a theme that hasn't happened, and needs to. That said, a "Walking Dead" themed game seems like a no-brainer. It's a widely popular franchise, and is based on a timeless theme. Plus Zombies are hot right now. Right in Stern's ballpark, in my opinion. Zombie games on location would definitely rake in some cash.