AHS Cult: I mentioned a while back that from the interview with Ryan Murphy last year it seems to me that he wants to do Cult. And advertising would work for Cult because Orlando is most likely doing it which would add to the whole political thing and that's there is not that much political stuff in Cult. Not really a lot. Some but it doesn't mix with the Horror Scenes/Moments of the Season. It's just kinda there in the background. I either see a Asylum or Cult solo Maze but could go either way. Don't mind either one as I want them both equally.
Classic Monsters:
Took a lot of time to figure out. I expect us to see some mashup maze at HHN this year and I don't think it's gonna be AHS or Blumhouse. I do think Universal Monsters is likely. The whole they haven't tackled it because they don't know how to make it scary ties in perfectly with Parisian Courtyard and that it took a lot of time to figure out. A lot of time to figure out how they are scary like how it took a lot of time to figure out the backstory of Titans of Terror. Also...
This kinda sounds like something Murdy would use for Universal Monsters. The Setting/Facade for Titans of Terror to tie all 3 Icons is a Home Haunt. Well to tie all the Monsters is a Graveyard or Friary possibly.
Also he tweeted this a little bit before he tweeted about writing the first maze. IMO a bit of a coincidence.
Nightmare on Elm Street: I think this would happen. It would be a good excuse to reuse all those Freddy Props. Plus Freddy has been the Star somewhat of the past two years of HHN. So to use him as a Icon almost or a theme for HHN2018 would actually work really well. Like the whole event is living your worst nightmares. Dream Warriors seems to be most likely and it was somewhat tackled in 2007. But it could also make for a Cheesy Horror Maze. I could totally see it happening.
The Thing: A while back there was mention that HHN would have a Huge Budget so it would work in terms of The Thing. Also...
The whole "Snow" setting Murdy although obvious makes me think of The Thing. Although Murdy has had more Obvious clues.
I do agree with what you said about AHS Asylum, IT, Stranger Things, Halloween, and TRT. But I do also want to add why I think some of this other properties also have a chance.