This is all really just opinion so dont take it to heart, but I really dont think Five Nights at Freddy's Four is really necessary or necessarily a good thing.
Sure, I know there are a lot of you that are going to jump and me and start screaming about whatever you like, but honestly it seems as if now all Scott is doing is milking it. We got a good taste of the story line from one, two, and three leaving many people satisfied and several not predicting another. We see some people like Game Theorist thinking the third was the last, and then realizing against it in the last half of his third theory video. We see Markiplier, the Jesus and all savior (apologies to the religious people out there that may find that offensive), saying that he wasnt sure if he wanted a third. We see Mandopony, the creator of some of the famous fansongs, deciding not to make anymore songs.
Sure I bet a lot of them are still going to continue what they do, but can you really not say that it seems a little pushed?
Not to mention that the games are starting to get a little old in flavor as they go from frightening to just flat out frustrating and rage inducing.
Really to me it seems more for money though because even the people who are getting bored will continue to look into the games.
Anyways, its just my opinion.