On Scott Cawthon's website, he teased different pictures to announce the game. If you brightened some of the teasers in Photoshop, you could see hidden messages like "3" and "until next time".
The filler text in the newspaper ad at the start of the game contains Scott Cawthon's thoughts and feelings on making the Five Nights at Freddy's series.
It has been confirmed that Five Nights at Freddy's will be getting a movie adaptation after Warner Bros. got the rights. It is not known if it will follow any of the games.
It's been confirmed that the new animatronic's name is Springtrap.
On Scott's Steam Greenlight page, he posted an announcement which contained double letters where they did not belong. They spelled out "I am springtrap", and Springtrap was rumored at the time to be the new Animatronic's name.