Just wanted to tell an idea I thought of.  In fnaf 3 in one of the mini games with the kids wearing masks  some of the kids were masks of the animatronics we know. however there are other kids wearing other masks of different animals. Perhaps these  masks represent never before seen animatronics are from a sister location or may even be the cast if a new fnaf was really being made. Fan art of these we'll be up soon ;)