I'll give you the mashup zone, but lumping Insidious into the same Blumhouse bucket is like saying Ghostbusters is just a Sony movie and we just had a Sony videogame last year with The Last of Us. They're just the production company in many instances.
I'm actually excited for Dead Coconut. Hollywood was able to have FNAF props and stuff displayed, so there is no reason to think that Orlando, in a well lit, indoor, controlled environment couldn't possibly get them to display as well. Same with other Blumhouse produced movies that rights might be an issue for. If the pieces are owned by Blumhouse, I don't think you'd need the IP rights holders to sign off on exhibiting the. I'd be very interested to see if they have a roped off section {like a museum exhibit) featuring props/costumes/etc from some properties that would never be allowed for a house/zone/show/etc.
Also wouldn't be shocked if the Dead Coconut just had Blumhouse logos randomly thrown up places and the bartenders wore Purge masks and called it a day.