I agree that Resident Evil is a high chance of being a maze (maybe even a scarezone like Silent Hill), Universal Japan has used the settings and characters from the hit game franchise and from what I've seen has been a huge success.
https://www.youtube.com/embed/A8orjrf_HqI?feature=oembed (Here's a video of part of it).
The Walking Dead also has a very high chance of being at the event once more. The popularity of the show coupled with merchandise is a factor that plays into a return but also the new locations such as the abandoned overrun prison. These locations give a new take on maze settings as well as a new layout as compared to last year. Keeping a familiar yet brand new Walking Dead live experience for fans of both the show and HHN fans a like.
I do see Trick R' Treat being utilized and I have to disagree with Bruce about any difficulty replicating the films characters and settings. The majority of characters are humanoid and we've already seen what HHN can do with the Thing, so I don't believe this to be an issue. The settings can be done as we've seen with both La Llorona(The river scene) and The Walking dead (The tank/city scene). The school bus I'm sure can be done and barring that most of the scenes are in a urban environment or in the woods. Both of which HHN has done before in years past.
Evil Dead I see possibly making appearance, the good reviews and popularity of the new film coupled with the classic films makes for an enticing maze opportunity. We've seen the wood setting done with Friday the 13th and most of the demons are done by physical actors so it fits in with Murdy's rule of a maze must have characters that can be portrayed by live actors.
The Back lot tour worked so well with the Walking Dead last year I would like to see it return like Bruce said in his thoughts season 3 offers a few location opportunity for this to work again.
However my own thoughts I would like to see something involving Ghosts. As with Legendary Truth in Florida's event, they haven't really been done here yet (Ok I guess La Llorona could count) However America also has some amazing Ghost stories to take inspiration from. Classic ghosts I think would be a welcome addition to a years line up and fit's with the Halloween theme. An Original maze would be something fresh and leave the public and fans not know what to expect. This may help scare factor rise significantly as well, for example I can go into a Friday the 13th expecting Jason to pop out. For me at least it lowers the frights slightly because I know what to expect. However an original maze such as La Llorona did frighten me because I had no idea who or what she was before I went two years back.
These are just a few of my own thoughts on this year's event.