William may be Mike's father in the movie universe
What if Movie William Afton is actually Mike's father? Maybe Mike's mom gave birth to Mike and left William because of his madness, and William still can't let go of the past and wants to kill her kids. It actually makes sense, since in the game's lore William is Mike's dad. I also theorize that Golden Freddy is possessed by William's son. That may be why Vanessa is so scared of William, maybe he actually killed her brother and she got scarred for life. (I apologize for any grammar mistake, my English isn't perfect)
What if Movie William Afton is actually Mike's father? Maybe Mike's mom gave birth to Mike and left William because of his madness, and William still can't let go of the past and wants to kill her kids. It actually makes sense, since in the game's lore William is Mike's dad. I also theorize that Golden Freddy is possessed by William's son. That may be why Vanessa is so scared of William, maybe he actually killed her brother and she got scarred for life. (I apologize for any grammar mistake, my English isn't perfect)