At San Diego Comic-Con, Justin Simien discussed including lots of lore from the Disneyland ride in his film and if the Nightmare Before Christmas version of Haunted Mansion can loop back to become a movie all over again. At San Diego Comic-Con, Justin Simien discussed including lots of lore from the Disneyland ride in his film and if the Nightmare Before Christmas version of Haunted Mansion can loop back to become a movie all over again.