According to this theory, after Michael killed his brother, he would be scared of the animatronics that his friends were dressing up as. Foxy would be hiding in the closet because he would represent Michael himself, who would be afraid of himself after what he did. And Fredbear would be at the end because Fredbear's prank had ended everything he thought was funny, and he discovered the gravity of everything, and after that, a great trauma would come, represented by Nightmare(I also had one more theory, vote if you want me to bring it too)