I’m unsure if this is the haunt Freak is referring to, but Knott’s had a haunt back in the day called Horrorwood. I don’t think this is exactly what we’re getting this year, but it was a house that unofficially, and I emphasize unofficially, celebrated multiple different horror films.
As for the 50th Anniversary Haunt, I wouldn’t be shocked if it’s a mashup of multiple past haunts. I’m beating Doll Factory will make a cameo.