That's possible, but I don't think it would make sense in this scenario. I guess if we're having a nightmare or dealing with paranormal stuff in general, I guess it's possible then.
I've always wanted there to be a FNAF game that takes place in Fredbear's Family Diner, or the first Freddy Fazbear's Pizza (the one where the murders of the first five children happen). It doesn't look like that's really happening, so I'm hoping that what you said is true. I just hope we finally get to learn what in the hell happened in those first two locations.
I think we'll still get another game. After all, he didn't use the "Final Chapter" subtitle in the trailer