Check this out (maybe tomorrow so that you can get some sleep. lol) https://www.youtube.com/watch?v=9dtmbgNtTAc
Apparently it's a mini game you play if new Freddy kills you. People in the comments are saying that during it Freddy says the letters that spell "save them". Have no idea what's going on but hopefully we get some answers when the game is released.
The problem is they put things in there but they never explain it! I'm sure you already know about the article about the 5 murdered kids from the 1st game. With this version now that like 10 animatronics are walking around it doesn't make sense. :/