Well you have Insidious 4, Get out, and The mummy directly from Universal.
Get Out is wildly popular and would be an easy house. Insidious we have already had and was popular so would be a safe bet.
the mummy... I honestly don't think it would translate well. then again, we had the original... twice? I guess it depends on how the movie will be handled.
In the indirect Universal department, Krampus was very successful. So Trick R' Treat is a possibility. Not sure how BIG of one.
Other Legendary titles. Kong: Skull Island and The Great Wall solid possibilities.
I haven't been following either side but I'm sure Hollywood has code names and a good idea. But, with IT coming out September 8... would be safe, dual coast, synergy and New Line Cinema has worked with them before. Other than that of course the shining would be amazing.
Classic Throwback... IDK that's tough they've done all their dream projects I'm aware of. Curve ball: Funhouse or My Bloody Valentine. I've come to the conclusion they will never directly do HP Lovecraft. Just things inspired by it. But At the Mountains of Madness, dunwich horror,The Shunned House, and, of course, shadow over Innsmouth.
However, you still have Carrie, Cujo, and Christine that could be done as well.
Originals: Nightingales vs body collectors, Something inspired by Lovecraft. Something 3D. Maybe the boogeyman/dark ritual house that was scrapped a few years back. It's also been a while since we have had a "true meaning of Halloween" house. So maybe and old world style "the Hallow"-esque type house.