Disney/MGM Studios makes sense to host halloween nights. Disney owns a wide range of scary movies to tap into. Their connection with Marimax (the Scream Movies, I know what you did, even Shaq in Kazam) will create some great tie ins and maybe they can work on a scary movie to be released in conjunction with the halloween nights.
Just my thoughts.
I forgot about all them. Howver I think Kazam maybe a little to scarey for anybody to handle. Not to menchin all the Disney villians, A Nightmare Before Christmas. And I have image in my head of a haunted Pirate ship from the POTC films.