Jane is claimed to just "be sleeping" when Abby is being taken back to Fazbear's, although she's clearly fallen over dead with no warning or notice. Note who's taking her back there: Golden Freddy. What does Golden Freddy do when you look at him for too long in the first game? He shuts the game down, taking you out instantly.
Of course Vanessa would be a police officer in this movie. Once an Afton, always an Afton.
Vanessa only shows up to talk to Mike on the second night. Mike went to work immediately after getting the job - to the point he didn't even have a security guard uniform. Vanessa probably only found out the day after.
She also goes out of her way to push Mike towards quitting. Because while the animatronics are friendly to her... Well she knew where the first aid kit was for a reason as well as how it is caused.
Similarly - her response to Mike sleeping on the job. Which is neither about the drugs or sleeping on the drug. It's because falling asleep is how people get killed - see Mike being moved to the face shredder chair but also the ghost sleep attacks.
Vanessa's attitude about Abby being at the Pizzeria appears to become more positive over time. She actually only has the cheerful attitude when the animatronics are around; whenever she's alone with Mike, her happiness about Abby being present is noticeably missing.
The Employee of the Month board being made up of YouTubers is a great little meta joke. They're all veteran players of the games, so of course they would appear as former "employees" of Freddy's.
A lot of people who have seen the film wonder why there isn't a daytime guard (which there was for the game), but there is a nighttime security guard. There is a plausible reasoning behind it: normally, people don't break into places out in the open like the pizzeria during broad daylight out of the possible fear of being spotted and the police arriving early than expected due to someone reporting it, as most would wait for nighttime because it affords that the darkness can conceal the crime being committed. The only reason why someone broke into the pizzeria during the day in the film was because Mike's aunt hired them to do so in order to sabotage Mike's chances to be the guardian of his sister.
Not to mention, that's one less body of a dead security Afton has to deal with on a regular basis in comparison to the one he gets for just the night guards.
The way each animatronic scores a kill on Jeff's gang members ties into their behaviors in the first game:
Chica doesn't kill Carl herself, but she and the cupcake are in the kitchen, where Chica often goes to bang pots and pans in the first game. The sound of banging pots and pans even takes Carl's attention off the cupcake long enough for it to reunite with Chica.
Hank hides from Chica in the restaurant's storage closet, where Bonnie catches him. Bonnie is the only animatronic to enter the storage closet in the game.
While it's played a little differently than the game, Jeff blocking the vent in the office against the cupcake could be in reference to shutting the office door in Foxy's face in the game. And for a more overt nod, he does his iconic run down the hall to catch Jeff in the end.
Freddy's kill of Max is a tad more subtle. Most people have said it's a reference to the bite of '87, and that might be true, but the way we get there is much more important. She's lured to the back room and up to Freddy because she thinks she sees and hears a kid in the pizzeria. It's most likely the spirit manifesting outside the suit to bring her in, but she's still only getting glimpses of him. Perhaps this is a nod to the hallucinations in the posters on the walls of the pizzeria in the game?
Compared to Freddy, the way everyone makes their kill is brief but Freddy's is more cinematic wit buildup. This is more in line with Freddy being the only one with a death "cutscene", when the power goes out.
Foxy's ghost's reaction to being chased by Mike. While part of it may be simply being a ghost. And under Afton's control, you have to remember that the moment he's a child murder victim being chased and grabbed by a grown man. Even if he doesn't remember that the Yellow Rabbit did it, it makes sense that the situation might be just familiar enough to add another reason to his jumpscare.
At the end of the movie, Mike offers Abby two possible meals: pizza or spaghetti. Seems random, but they represent the two most significant locations in the franchise: The various pizzerias, and Fredbear's Family Diner (Spaghetti).
Mike's first night was relatively calm. Succeding nights get more and more hectic with more problems. By Night 5, he is facing off the Yellow Rabbit for the very first time while the previous animatronics are either down most of the time or act as support for the "boss". This parallels games like FNAF 4 and Sister Location as well many fan games where the 5th night is a Boss Fight (For fangames, it is really common for Spring Bonnie/Fredbear to be the final boss(es) or an Expy who is one of the original animatronics).
An addendum to the above: Mike's spent his first night at Freddy's mostly sleeping, then on his second had Vanessa turn up. On his third, he brought Abby, then brought her again on the fourth when she got electrocuted by Bonnie's guitar. Finally, he went back one last time to save her... meaning that, in total, Mike spent five nights at Freddy's exactly.
The film's novelization gives Mike's current age as twenty-five. He was twelve when Garrett was abducted, thirteen years prior. The movie is set in the year 2000. What is two thousand minus thirteen? Nineteen eighty-seven.
Aside from getting some actual relevance for once, Chica is the one who lures Abby into a suit since her possesor is a little girl just like Abby, making them the most similar.
When Vanessa shows Mike the band in action, they short out and stop immediately after she invites him to dance. Well, the animatronics are possessed by children...and how do little kids normally react when adults start flirting in front of them? Foxy even freezes with his mouth hanging open, as if in shock.
Since Afton now works as a career counselor, how many down on their luck and desperate people has he tricked into working security for the pizzeria? He could easily pick the ones that have no friends or family so that when they "disappear" no one will investigate.
This makes the Pizzaria in the movie an H.H. Holmes-esque Death Trap that allows William to automatically kill and dispose of his victims using the animatronics, all while being completely free to secure whatever airtight alibi for himself that might be needed, in the unlikely event the crime scene is ever investigated by police, or if a body is ever discovered. Most likely, this is why he never shows up until the 5th night, after it is clear neither the Animatronics nor Vanessa are willing to kill Mike.
It gets worse when you realize that the pizzeria is considered closed to the public, which would include law enforcement. That means the "job" he offers the guards is non-official and not on the books of the employment office. That means not only he picks people that have no friends or family when they "disappear", but the fact is that not even the employment office knows that these people who "disappeared." Even if law enforcement investigated, if they ended up at the employment office, records would show that they came in for consulting but that there were no jobs available and they were turned away, only to never be seen or heard again. Afton is in a position where he not only has an air tight alibi for the deaths of the guards, but he also has a means of making sure that law enforcement has no idea that they were "hired" for the pizzeria also, which means their bodies may never be found (assuming Mike didn't tell law enforcement about the pizzeria, Afton and what happened to there).
What can really be unnerving is the fact that Mike has probably seen Afton multiple times throughout his life, given how he has trouble keeping a stable career. And in all that time, Afton's gotten to the point where he can casually talk to Mike as a job counselor. When you think about it, it's actually pretty chilling to know that for years, the man who murdered your brother, ruined your life, badly traumatized you, and committed who knows how many other horrors was hiding in plain sight all along and was casually talking to you as a seemingly legitimate job advisor who wanted to look out for you.
Possibly not: he seems to be reading Mike's profile for the first time, as the surname "Schmidt" gives him pause.
During the climax Afton mentions that Vanessa had to kill the security guard if he got too close. Since Vanessa in the games was a brainwashed Jack the Ripoff, and Elizabeth (Afton's daughter in the games) also killed people in the novels, this implies that the film version of Vanessa might have a body count of her own.
This is further hinted at with "If he's there... I won't be any use to you, believe me." Implying that this Afton may have other ways of making Vanessa Brainwashed and Crazy without the use of a VR headset.
Mike and Abby's problems may not yet be over - after all, Jane's body was in their living room, and even if the other bodies aren't found, Max and Steve/William were known to have recent contact with him. Jane's lawyer Doug was also present when she sent Max's brother and his friends to loot Mike's place of work. If Vanessa doesn't wake up and cover for him, Mike could be suspected of several murders, as well as her own attack.
Golden Freddy lures Abby back into the pizzeria by masquerading as a springlock suit who is her friend. Sound familiar? It's William's M.O.
At the end of the film, Mike is still unemployed and seemingly has no living relatives or friends able to help him financially. And since William died on Mike's fifth night, he never gave him a paycheck.
