so somehow mike/CC died and was rebuilt as a robot that was finished in 1985 just like in the books but instead of mikes real memories afton gave fake memories of him killing the younger brother that he doesn't have which would scare mike away from freddys restaurants so william can do the MCI in secret however midnight motorist happens and mike goes to the sister location bunker (they was no funtimes it was just made to watch over aftons kids) and in the breaker room we see that the plushtrap hallway has plushtrap and 4 other animatronics and because of the release date of SL and the books these are most likely the 4 closets *un-happy matpat noise* so after almost finding the truth william locks him up in the fnaf4 bedroom and has the withered animatronics attack him (this isnt fnaf4, fnaf 4 is a mix of Michael's memories in one nightmare that takes place before fnaf6) intel the funtimes are made, get too aggressive and sends micheal down to SL and thats why Cb says "you wont die" to the SCUPer a machine made to inject remanent into ROBOTIC things.

(it also explains why micheal in SL has the same colors as CC but the books confirm that foxy bro is mike)