They were probably gun shy about another one after the horrible Alice Cooper house way back when. The Rob Zombie scare zone was one of my favorites ever, and while I don't care for his movies, the House of 1,000 Corpses was one of my favorites last year.
I hope for more Zones like this as I think that is where it works best as you just have have the music blasting all night long and not playing over other songs by the artist in the houses were you hear snippits of 7 songs for 25 seconds each. The party aspect of the zone worked so well that I hope it's a new tradition to have one artist every year.
I'd love for a Marilyn Manson one where you have a Manson look alike on stage (just needs to be a skinny dude, the rest is all makeup and a contact lens) performing a concert (aka lipsyncing songs) and have some story like his music opened a portal to hell or something and have beasts roaming about who massacred the audience. The stage performance is a great distraction for scares. Have a "plant" that stands in the crowd who is periodically taken, literally kicking and screaming, by the beasts. And I'm sure the beasts would spare a few scantily clad women and shirtless beefcakes to dance for their entertainment ;-)