So remember how Andrew infected several things in the FF epilogues?

And how we still don't fully know who was in control of the Fredbear plush in fnaf 4?

Well I think those are connected (sorta).

In fnaf 4 the plush keeping an eye of CC and seems be trying to keep him safe, like the Freddy plush in 'The Cliffs', well I think that 'The Cliffs' is canon to the epilogues and that the doll is infected with Andrew's agony, and since 'The Cliffs' parallels William and CC's relationship, I think that the Fredbear plush is infected with VS's agony, explaining why it wants CC to be afraid of the animatronics, because VS was killed and stuffed inside one, and I think this could explain what happened to CC how he ends up possessing Golden Freddy with VS, I think VS was saying he'd put CC back together by putting him into Golden Freddy, however I think CC possessed the Fredbear plush first, like how Jake starts off possessing Simon then somehow ends up part of the stitchwraigh