Assuming Gunslinger is most likely gone and Dead of Winter may or may not be leaving, they still have two spots to fill. I hope they have two more mazes because just two would be a bit disappointing for the 45th anniversary. I can see why Voodoo and Tooth Fairy are staying because that would mean all of the new mazes would be in that corner, thereby causing all of the people to overcrowd that space.
They're going to be down a scare zone this year, so I wonder if they will make up for those loss of scare actors by cramming them into the already existing ines.