There are lots of things that we don't understand about the lore of FNAF, and so many unsolved mysterious about the series. However there are also quite a few things we do know, and that people just need to accept even if they don't want to.
The Bite of 83, and Bite of 87 are not the same thing. It's kind of amazing how people are still confused on this, and I think we can blame Markipler for that https://www.youtube.com/watch?v=S-SnfN8Gn3I . The Bite of 83 was when Michael Afton stuck his younger brother's head into Fredbear's mouth and Crying Child's head gets crushed and he dies. We however don't know much about the Bite of 87 but it was presumbly a daytime security guard possibily Jermey Fitzgerald getting bit by one of the animatronics, possibily Mangle, but also maybe Toy Chica. Infact the only thing we do know about the Bite of 87 is that the victim survived.
Elizabeth Afton did not die first. I see why people thought that because of the whole empty girls bedroom in FNAF 4, and Crying Child having seen something he wasn't suppose too, however Elizabeth dying first doesn't work seeing as at that point William wouldn't have had a motive to build a bunch of murderous killer robots.
Michael Afton is Foxybro. I don't really how this is even a thing. Crying Child dies in 1983, and I'm no doctor but even if he did survive I'm pretty sure he would be heavily brain damaged, and unable to do all the things Michael did throughout the games. It really makes more sense for Foxybro to be Michael instead of Crying Child being Michael.
William's motives in the games, are most likely different then his motives in the books. In the Silver Eyes trilogy the reason William Afton killed the kids was because he wanted to be immortal, and while it is possible that was his motive for killing in the games too we have to remember that the Silver Eyes are not fully canon to the games, so there is a chance that game William has a different motive in the games then he does in the books.
The Man in Room 1280 is possibly not cannon to the games. Yes the Fazebear Frights story where William explodes making it completly impossible for William's corpse to be the one inside Burntrap. However there's also the possiblity that this story is not Canon to the games.
Midnight Motorist is most likely about the Afton Family. I know the new Tales Books says otherwise, but there's just alot of evidance, and it makes more sense for this Minigame to be about the Aftons. First we have the later that night text we see at the beginning of the Minigame, and we don't know what Rory's dad was doing before, but we do know what William was doing. Murdering Charlotte Emily. Hell the guy in Midnight Motorist is driving a purple car just like the one William drives in the Give Them Cake Minigame in FNAF 2.
Gregory is NOT a Robot. https://www.youtube.com/watch?v=QUFI11VZIuU. This one is pretty obivous, but there are some people who think it's true. However Gregory is not a Robot, and yes I know Robot Kids do exist, after Charlie in the Silver Eyes was a Robot, however that so far has been the only case of Robot Kids we have seen in this series, and Gregory is not one.
Gregory did not drop the elevetor to kill Cassie. I mean seriously guys Gregory was trying to help Cassie escape the Pizzaplex, why would he suddenly change his mind and try to kill her like 2 seconds later. Is more likely the Mimic was the one who cut the elevetor once again pretending to be Gregory.
Cassie being related to the Bonnie Masked bully is not as farfetched as people think. Look maybe he's not Cassie's father, but it's not that crazy to think they are related in someway. Like maybe he's her grandfather, or great grandfather.
The obivous answer is NOT always the right one. I actually just made a post about this so check that out if you want, but just because an answer seems obivous and straight forward does not always mean it's correct. Like Monty being the one to kill Glamrock Bonnie, that's the obivous answer even though there is evidence that supports the possiblity of that actually not being the case. Also in Breaking Bad when people that Gus poisoned Brock, turns out it was actually White.
TLDR: Facts the FNAF community needs to accept.
The Bite of 83 and 87 are different
Elizabeth did not die first
Michael is foxybro
William's motives in the games may be different then his motives in the Silver Eyes novels
The Man in room 1280 might not be cannon to the games
Midnight Motorist is most likely about the Afton Family
Gregory is NOT a Robot
Gregory did not drop Cassie
Cassie being related to the Bonnie Masked bully in someway is not as crazy as people think
The Obivous answer is not always the right one.
