Since Halloween is coming up, I'd figure I'd give you some more ideas!
Hocus Pocus Sanderson sisters costumes
Disney Villains costumes (Jafar costume, Oogie Boogie costume etc.)
Haunted Mansion furniture pieces (maybe the changing portraits or gargoyles for decoration)
Haunted Mansion Ghost Bride costume
Haunted Mansion Cast Member costume (something like this)
Hatbox Ghost furniture piece
Haunted Mansion stretching portraits (perhaps as posters?)
Chandelier
Maybe some hard wood floor pieces and peeling wallpaper
Mummy Costume
Devil Cosume
Angel Costume
Frankenstein and Bride of Frankenstein costumes
Backdrops with a spooky moon in the distance
Tower of Terror elevator teleporter
Again these are just suggestions
hope you consider some of these!