After thinking about Friday the 13th: Jason Takes Manhattan, I think it would be cool to have some sort of maze that takes place in New York. It could either take place in the Disaster queue, or in Nazarman's. Although I would prefer the latter location, I'm not sure if that location is still open after that Starbucks has been built there. The maze set in New York can have one of these two scenarios:
1) It could be a sequel house to Havoc, but have it set in New York where their secret experiments on feeding power from energy, testosterone, and glucose (That's their experiment, right? I forget the back story. lol) go completely awry and end up attacking the people in New York.
2) It can be a world apocalypse house like they did in 1999, but have an apocalyptic 2012 theme. Crazed and blood-hungry people everywhere after you for food because of the massive disaster that has happened. Something like this would probably be more suited for the HHN XXII, though.