I'm surprised no one has mentioned the possibility of a Blumhouse Volume 2. Especially with how successful the Maze was this year with it being the 2nd highest rated maze this year. But my quick thoughts on what I think will happen for HHN2018.
AHS Cult - New Season. Been seeing a lot of requests from people for this one. It has content and I wouldn't mind it. It's a great season. If Orlando does it this year and Hollywood does it then we can easily promote without suffering from the whole Orlando does 3 Seasons while we do one of those seasons.
Blumhouse V2 - While I disliked Blumhouse a lot it was very popular on multiple nights and was very highly rated. The Purge, Get Out, Truth or Dare. The Purge we have seen and there is a new Movie coming out. Easy to promote and they can do the Gaunlet again. Get Out extremely successful movie this year. It has some content and is a great movie. Truth or Dare is a Movie coming up in April about a College Student being haunted by a Supernatural Spirit. Would not be surprised to see Blumhouse again.
Halloween - Speaking of Blumhouse we all know there is a New Halloween Movie coming out in 2018 and it's being made by Blumhouse. Very highly requested from what I have. Halloween both 2015 and 2016 were very well received. Michael Myers is too big of a character IMO to be thrown into Blumhouse. So I would imagine they would want to give him a Solo Maze again.
Trick 'r Treat - Orlando did a Scare Zone this year and was the Highest Rated Scare Zone. It's very well requested and has content. I would imagine they would want to do TRT finally.
The Strangers - Was done back as a House of Horrors Overlay in 2008. The First film was made by Universal and there is a New Film coming out this March. I have seen a decent amount of Fan Requests for it. So I would think it is possible.
Poltergeist - The trend of every year being that every year we get a Classic Movie as a Maze. '14 AWIL, '15 Halloween, '16 Exorcist, and '17 Shining. It has some fan requests and I'm sure people would recognize it very much. It has content and I could see it happening.
Original Maze - I don't what to say if Universal doesn't know that we want a Original Maze. A lot of requests for La Llorona to come back which I don't see happening. I could see another Folklore maze happening. Legends like Chupacabra, Japanese legends like Shuten Dõji, Kuchisake-onna, or Native American Legends like Yee Naaldloooshi, Skudakumooch, Teihiihan, Wendigo, etc.
Now here is what I don't see happening.
IT - While easily the most Fan Requested I don't see it happening until 2019 or 2020. For the New Movie to come out.
The Conjuring - I would imagine they would want to wait until the Lawsuit is over (Also depanding on if Warner Bros wins) and when/and if a Conjuring 3 happens.
Stranger Things - Depands on if Netflix allows it. It has enough content to be a Maze but I wouldn't get too excited for it.