I think that Blumhouse's Halloween will be a house.
Conjuring would be awesome, as it has so much to work with. You have Conjuring 1 and 2, Annabelle, Annabelle Creation, and the Nun which is coming out this summer.
A Chucky house would be cool to see, since I have always been freaked out by Chucky. I would be so scared.
I think IT would be a good house, but there was a house for IT somewhere before the movie came out, so I don't know.
I do think AHS Cult will also be a house, but maybe not. With the pattern of three seasons in a house for AHS, maybe they wait till HHN 30 to do another AHS house.
Scarecrow the Reaping 2 would be sick.