I'm surprised no one else has said it, but I would absolutely loooooove Art the Clown somehow at the event and do a house based on Terrifier, now the chainsaw scene may have to be changed up, but I think this could be a surprise hit to the event.
Besides that, would love to see original houses based around other phobias, and have a whole event where each house represents a different phobia that people have.
Spiders – Arachnophobia
Confined Spaces – Claustrophobia
The Dentist – Dentophobia
Snakes – Ophidiophobia
Darkness – Nyctophobia