So assuming TLOU and Terrifier happen (was secretly hoping for NOES, as the slasher house but excited to see a new face at the event), that leaves 3 other potential IP's:
I'm speculating:
SMILE - this one has gotten some recent hype behind it and with more sequels already planned, it could make an appearance this year. But this is my least confident one as i feel like a bigger IP will replace it.
Nosferatu - Imo, this fits right in to replace a UM house, in some ways id categorize it as a UM in the first place. I do think box office success has an impact on whether or not this happens.
Blumhouse House - I mean it seems like a no brainer with MEGAN coming. Her presence over the last 2 years and new movie; now would be the time to get a solo house and knowing blumhouse it will probably be a 2 part house for both movies.