Awesome. My wife has a theory on the lifecycle of malls - the short, boring version is one goes up, does well, eight years later another two go up, the original one falls. It seemed extra noticeable when we lived in Wisconsin.
The mall of my childhood seemed to buck the trend and has been going strong since 1981 - until recently. One of the large department stores was replaced with a farming store, where you can buy feed, seeds, blue jeans, and even, unfortunately, chickens. The parking lot outside of it is about 50% shiny trucks that have probably never hauled anything dirty. There's rumor that it will expand and buy the entire mall, and I think it killed off an old, local farm supply store chain.
If you're curious, you can see pictures under "Death of a Mall" here: http://bitlather.com/blog/article/88/sprint-17-when-everything-changed
My favorite sign inside is "We now offer live bait in the gun barn!"
Anyway, I think the theme of "Super Dead Mall" has the potential to be much bigger. I remember being a kid and wanting to build a version of "Zombies ate my Neighbors" in a mall. They did have some mall levels, and Dead Rising hit it as well. There's potential for more than just zombies, though. Haunted refreshments is a great direction to start in.