So there is many changes in this trailer, then in the real game. Firstly, the endo head thing. They were going to be an enemy on night 4, and would slowly build up, kinda like nightmare freddy in FNAF 4. next is the shadow face thingy saying why did you come back. IDK what i was cooking with the lore back then but it has something to do with the very old FNAB lore. next we see the beta version of one of the rooms, its very bad and im glad i replaced it with the one in the game.

Theres another unused thing, this time being the arcade from the outside. not much changed from this and the full game. Then we see endomass. Endo mass was going to be the main villian of FNAB 2. not much is known bc i dont remember lol. It them shows fading images of Lurr and branden, the models never did change. And yeah. this game changed ALOT. And theres a TRAILER 2 For FNAB 2 btw, if u want me to cover that then just say in the comments.