Boo from Monsters, Inc. was in Toy Story 4.
This is especially apparent with the puppy, whose name was Daisy.
—Sam Kramer, Facebook
So far, all of the Marvel movies have been separated into different phases. Phase 1 featured everything from Iron Man until the first Avengers movie, Phase 2 encompassed everything from Iron Man 3 to Ant-Man, and the latest stage was everything from Captain America: Civil War until its newest movie, Spider-Man: Far From Home. The sign cleverly asks, "What comes next?" as it transitions from Phase 3 to Phase 4.
The loud bags and crunchy chips would obviously draw attention to the super-hearing monsters.