The clue that solves FNAF!

With the FNAF Halloween update finished and Scott moving on to the Five Nights at Freddy's novel and the upcoming FNAF World, it's time we look back and finally put to rest the original FNAF tetrology. We have all the pieces...but what are we missing? Scott Cawthon have us theorists some clues to go off of during our Five Nights at Freddy's livestream, which led to new revelations and me to discover the clue that breaks the entire FNAF series wide open! Prepare to have your mind blown!