Del Toro is good friends with The Scarehouse in PA
BTW Legendary Pictures also worked with Scarehouse to bring a Trick or Treat Maze to there haunt.
We can speculate all we want to be honest but they havent even started to write storylines for houses at this point (My guess)
They start with 12 houses with a rough layour for all the houses, then they cut houses to 8.. By Dec there writing out the storylines out,