Board Thread:Ideas/@comment-26813439-20151031040448/@comment-25535739-20151102011622

(Major spoilers for FNaFB 3 act 3 ahead, read at your own risk)

Sable has said that if there was a FNaFB 4, it would involve Bonnie, Chica and Foxy remembering Freddy, and then going with Toy Freddy into some castle so they could get him back (Basically parodying Kingdom Hearts: Chain of Memories).

Freddy himself didn't actually die, he went to the Night X dimension, where he met the Night X versions of the characters, desperate to be relevant again. He, with amnesia, joined the Debauchery XIII, consisting of:

Night X Freddy, Night X Bonnie, Night X Chica, Night X Foxy, Night X Toy Freddy, Night X Toy Chica, Night X Toy Bonnie, Night X Mangle, Night X Withered Freddy, Night X Withered Bonnie, Night X Withered Chica, Night X Withered Foxy and Night XXX Freddy (Otherwise called "Gud" Freddy).

Apparently, while going through the castle, they would fight nightmarish versions of themselves, (That being the nightmares) and after reaching the top and defeating Nightmare Freddy, it is revealed that the true antagonist of the series was Golden Freddy all along, and he appears here, stronger than ever, as Nightmare Fredbear. That is the end of Act 1.

Act 2 of this is my own work, and if you'd like to read it, I have some time to spare.