The characters we know as the main crew, have now been dismantled, frogotten, deactivated, ect. and replaced with these new versions known as Chica 2.0 Bonnie 2.0 Freedy 2.0 and SpiderFox. (Foxy 2.0)
They all were replaced with cuter and better things but, some new parts were placed in the old versions, causing them to come back a little. but not fully, it takes some things to bring back a soul trapped in a suit right? Right? Well, the Marionette is perfect. He is a dark soul, probably a previous person killed such as the main, replaced animatronics. But maybe, just maybe since he is a marionette, hes being controlled. But by who? It couldnt be the one whos been helping you could it? The only man who has told you how to survive this nightmare? Well it may be the Phone Guy, or Mike Schitt the previous security guard. (You are a new guy?) But the Demon controlling Mr. Marionette has been torturing the animatronics. The marionette, not controlled by anyone, was tired of being controlled himself and gave life to the old animatronics, and has now been controlling them. SpiderFox, she the poor thing has been torn apart and put back together by children, with Chica 2.0 gathering parts to try to help, but with no sucess. Foxy 2.0 has since turned into SpiderFox, using her extra limbs to climb and crawl and become the spider.
The old animatronics are tortured by the marionette, and they want their freedom, They dont want to be controlled, they want the marionette gone. But Something Borrowed, Somthing New, Bonnie 2.0 has a lot of the original bonnie, same with chica 2.0 and they dont have the power, and the energy to fight back fully. But now, they all Fully Powered, just as a new security guard comes they are fully powered, angry, and want revenge. GOOD LUCK
NOTE I am watching videos of FNAF 2 as I write this and I see that in the night transitions it shows YOU in the freddy head and to your left, chica, and right is bonnie. None knows wat happened to Mike Schmitt the previous security guard. The Phone guy says, if you fail you will be suit stuffed! and your veiw is fom Freddy, on the stage with your 'crew' Is that veiw from Mike Schmitt? also on night 3 i think? it shows the face of the marrionette following freddy so... dman. whats your theory on this?