That would be a good thing to have in one section of KI Collections. They could put out some more FearFest merch (beyond just the singular pin) as well for the nostalgia points. It doesn't need to take up an entire store, just one part of one store. A Winterfest section could also work well.
A Haunt/FearFest legacy store would be an excellent way to sell merch. Im sure a lot of people would enjoy even simple t shirts with the logos of many of the haunted houses from over the years on them. KI’s missing out.
As a lover of plushies, I can say for certain that more adults love plushies than society implies. Have plushies of Maestro, Archie, and Larry and.. those would sell like hot cakes for sure or for further comparison, bananas too.
I know they built The Racer as something ‘new’ for Kings Island, but looking back it would’ve been neat if they moved or built a new Shooting Star coaster as well. They thought about it but decided not to do it.