A concept I've heard from time to time on Tumblr (My friend runs an ask blog and RPs a lot of FNaF stuff, I also occasionally look), is the concept of Freddy Fazbear's as a Franchise.
They usually use it to justify different versions of Freddy, Chica, etc., but the best part is that it also applies to those myriad FNaF OCs.
Totally believable for one Freddy's to have a different set of characters with the regular ones.
So, who knows? Maybe FNaF 3 will have the Franchise concept
But one I find far more believable is something similar to Chuck E Cheese.
Something I learned from Mulletmike's Creepy Gaming is that there were animatronics before Chuck E., they were...
Showbiz Pizza Place. Eventually, the restuarant that had those animatronics were bought out and absorbed into Chuck E. Cheese
So level with me, if Five Nights at Freddy's 3 was in the future again, what if another company bought out Freddy Fazbear's and put those animatronics in with their current ones?
That make sense?