They’re finally free.
I personally think the 3rd game is the final installment of this series. The ending seems very fitting for a grand finale, at least for me. But hey, if there will be a 4th game, then I’m totally cool with it. Though I prefer if Scott Cawthon made a spin-off that may answer to the remaining questions, or a new game that somehow makes references or even answers as well to the FNaF series.
You can now buy prints and shirts of these!
So I still say FNAF3 is potentially the end of the FNAF series, and that's that for me, no matter how much fans would show evidence to me. I'm still open to the possibility that an official FNAF4 might be around, but it's ultimately up to Scott Cawthon, like I said in the description.
People need to chill about this. It's like the Megaman fandom when they complained there were too many games already, then suddenly complained again when Megaman Legends 3 was canceled.