From general information and conversation that I've had with various staff, this is my general prediction, but nothing is 100% or has been decided and all could still change.
Jan - we will see the start of the SW8 ground works, including the removal of the flume.
Hex will return with some TLC including new projector, floor relaid, the octagon preshow has some work done to it and maybe in the main vault a new special effect on the floor using a large screen.
Nemesis-sub Terra will remain closed and probably be turned into a store room
Scarefest will return with two weeks running like it used to, over both the Scottish and English half terms.
Three day fireworks (Friday to Sunday)
As for anything else, I don't have a Scoobydoo