Yea, if they did, I would imagine it being like Gringotts where there’s still some line afterwards. Just to break up the line, but not close enough to load as to mess up load times.I don’t see why not. Works with the Haunted Mansion.
Maybe they go the FJ route and have cool stuff that’s good enough to be preshows in the queue, but the line keeps moving as needed. (Love when it snows in the Defense Against the Dark Arts classroom.)