If there's one thing A24 will not object to, it's selling dumb merch based on their movies. Anyway, after that opening, I'm sure they're kicking the tires, but it'll come down to the rightsholders and what they say.
Re: doing a creepypasta/analog horror inspired house, I like the idea but I don't know if the vibe will translate since so much of the appeal comes from the internet urban legend feel and often a deep well of lore, otherwise it's just "murderer with a messed up face" or "this creature lives in the woods." Maybe an SCP inspired house would work.