Originally the game was gonna be "called The Return to Freddy's 4: A Place of Happiness" which is an obvious reference to Wilson's line from the night 1 phone call.

Another scrapped thing was in dragondave mode, originally the characters were supposed to be replaced with "nightmare" versions, however it was scrapped since it felt a little out of place even if it was cool and will instead be used for a future trtf 2 game. since it makes more sense in that game given context.

Other than that, the game did not change much throughout development & aside from those two things above, the game released exactly as it was planned.