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David is Adam's twin brother, and a Jigsaw apprentice

Okay, so David, the protagonist from the short film, is played by Leigh Whannell. So is Adam. Obviously, they're twins, or else the Saw universe involves clones, which seems unlikely considering it's a realistic fiction series. Now, in a deleted scene from Saw, Adam says that he has a family, supporting the idea that he has a brother at all. Adam also says that he doesn't see his family much. Interesting... Think about it. Every other person who has been in the reverse bear trap helped Jigsaw. Why would David be an exception? In conclusion, Adam met his demise at the hands of his brother that he was so disconnected from that he didn't know the story of the man who tried to kill him.


A Jigsaw puzzle will be the final Jigsaw.
Because that makes sense.
  • Made of the pieces Jigsaw was cutting out of the skin of the people he captured. Stick them to a spiky mannequin, or something, and if you get too much blood on it before revealing the message, you starve to death in some dismal underground room. Figure out how to do it without causing yourself harm (or at least without getting blood on the pieces), and you find the key (...not necessarily a literal key, though). Would be good for someone with physically self-destructive tendencies, like Amanda (I haven't seen the later films, so don't know what happens there). They would have to find the path of least self-harm, or kill him- or herself once and for all (either way, making the human race slightly more appreciative of life on average). Would be an interesting twist, considering all the previous puzzles tend to revolve around getting blood out of a person's body, one way or another, to survive.

Jigsaw was testing himself in Saw III.
Think about it. At this point, it was already at least hinted that Jigsaw was starting to realize that the few people who did survive the tests didn't learn anything, so he was probably starting to wonder if he was actually doing any good, or if he was just a sick psycho who tortures people because he can't cope with his disease. Besides, he may also have realized that spending the short time he has left doing that isn't exactly the best way to show his respect for life either.

So he decided to create a game in which someone would be put to the test, but so would he. His test was to convince Jeff to forget his grief and to forgive to those who he feel wronged him (note the parallel between Jeff not coping with his son's death and Jigsaw not coping with his cancer). If he managed to do so, it would mean his games do serve their purpose and make people appreciate life. If he failed, it would mean his works were meaningless and only made people who already hit rock-bottom suffer even more, making him even more disrespectful of life than the people he tested, and he knew Jeff's anger would be so great that he would kill him (that also explains why he kidnapped Jeff's daughter and put his wife into a deadly trap, to make sure he would hate Jigsaw enough to kill him).


And last but not least, Jigsaw tested both of his apprentices, so it's not a stretch to believe that he would test himself as well, and being killed by a person he tested fit his theme of Karmic Deaths perfectly.

  • Concerning your last point, Jigsaw did drive his car off of a cliff and survive; Saw II shows him pulling a part of the car out of his abdomen. He could certainly seen that as his "test"; after all, that's when he changed from John Kramer into Jigsaw.
    • Good point, but he did put former victims into a second trap when he thought they still didn't respect life enough, so maybe he considered that him turning into Jigsaw just made him go from disrespecting his life to disrespecting other people's lives.

Jigsaw is just a crazed sadist.
Ostensibly, Jigsaw's philosophy is that those who do not appreciate life do not deserve it. Practically speaking, this becomes "If you aren't prepared to suffer to survive then you don't deserve life." However, his actions are extremely inconsistent with this.

First of all, look at his first two victims. Their "tests" were obviously not just a matter of "If you're willing to suffer then you get to live"; they both tried as hard as they could to escape and yet they died anyway. They didn't lack the will to survive; their tests were just too friggin' hard. Then we have Amanda, who has to kill an innocent in order to survive. So now suddenly it's "If you're willing to commit murder then you get to live," even though he supposedly abhors murder and only does what he does to get people to value their lives. And of course, we learn at the end that Adam basically never had a hope in hell of surviving.

Michael's test in the second movie is the only one that actually conforms to Jigsaw's "true" modus operandi; he could have survived if he'd been willing to endure the loss of his eye, but he wasn't, so he died. Fine. It's all downhill from there, however; first he uses blatant Schmuck Bait to trick a guy into shooting himself, then he sets a test for Xavier that he can easily avoid just by making someone else do it. Not to mention that razor box, which was just a flat-out trap. Nobody whose brain's been addled by a lethal airborne toxin could reasonably be expected to avoid that. Also, Jigsaw now seems to be be promoting a Power of Friendship message on top of everything else, because the victims would have fared a lot better without all the infighting. So now we have "You must kill to survive" being followed by "You must work together!"

Then of course we have Detective Matthews, who just gets screwed every which way. Not only demonstrate the will to survive by escaping almost immediately, he's smart about it; he breaks his ankle rather than sawing his foot off. And then he gets captured again and dies in the next movie through no fault of his own. Grand.

Also, Jigsaw's now trying to teach the value of mercy and forgiveness, apparently. This after forcing someone to commit murder and dragging numerous innocent bystanders into his "tests", including a little girl. Oh, and the final message of the movie is just great. "You didn't instantly forgive me for all the horrible, horrible trials I put you through, so now I'm going to make your wife's head asplode."

It's possible that this tangled mess is all justifiable somehow, but it's also possible that Jigsaw is just nuts. I know which one I'm going for.

  • The Razor Box trap had a way out: at the top of the box was a padlock with the key inside it, if the victim had spotted it, it just needed to be unlocked and then there wouldn't have been the bloody mess that ensued.
  • And as for Matthews, he failed his actual test (to talk to Jigsaw for a couple of hours without marching off like a hero). You could see this as justification for his subsequent death (at least, justified by Jigsaw's logic). Or, there's the other view, supported by the films: it's Amanda's fault, not Jigsaw's. Amanda is skeptical of Jigsaw's methods (understandable), believing that they leave survivors worse off than dying. So she takes it upon herself to lock Matthews in the bathroom as an execution. He's too clever, escapes, and so she decides to finish him off for his own good.

Jigsaw is really Kevin McCallister from Home Alone
Kevin was quite adept at dishing out vigilante justice with a variety of gruesome traps, particularly for an 8-year-old. It takes a twisted mind to permanently brand someone with a doorknob. His neglectful parents apparently never bothered getting Kevin therapy after two felons threatened to torture and murder him, since he deliberately runs away from a second family vacation, and his traps are noticeably more brutal in New York. Imagine what a kid like that would grow up to be.
  • This has been taken to its logical conclusion.
  • The timeline doesn't match up. The first two Home Alone films take place at the time when they were released, in the early 1990s, while the Saw movies seem to also take place when they were released, in the 2000s. Even assuming Kevin changed his name to John Kramer, it wouldn't explain how he aged over 40 years in only about a decade.

William didn't have to kill a single person in his game in Saw VI.

This is a theory that has been floating around in my head for a while, and it has been in there long enough that I think I may have sufficient proof for it. Basically, I don't think William had to choose between killing anyone during his game in Saw VI; I think there was a way for everyone involved in the traps to live.

First of all, look at Saw V: the people in the sewer trap thought they had to fight each other and that the trap was Survival of the Fittest, but it turned out in the end that they were supposed to work together. I don't think it's inconceivable for that kind of aesop change to happen in Saw VI, as well; William thinks he is being taught a lesson about the flaws in his perception about the relative worth of people's lives (for example, a healthy loner is not worth more than a sick grandmother), but it turns out he's really being encouraged to just drop those perceptions completely (rather than just correct them), and to give everyone a chance at life; in other words, to not try to assign life a value. After all, Jigsaw basically told William that his formula for deciding whether someone got coverage was BS because it didn't take into account the human will to live. If William was just being encouraged to rethink his perceptions on the relative worth of human life, then that would just mean modifying his formula, but I think Jigsaw would want him to just forget about his formula.

Now, I think there was a way for William to go about each each trap without killing anyone. I suspect that the Breathing Mask Trap was designed so that it wouldn't actually kill William. After all, without him, none of the other traps can go as planned, and thus Hoffman wouldn't have been able to carry Jigsaw's final will, and why make an innocent janitor go through everything that William had to go through? Thus, perhaps the trap would release them both if William were to simply breath enough to supposedly kill himself. This would have taught him that, though Hank was less healthy than him, that didn't mean Hank deserved to die.

With the Barbed-Wire Nooses, I think the responsibility was more on Allen's shoulder, but he could have survived. Watch the scene: his hands are released well before the noose tightened, meaning he could have grabbed the noose so that it wouldn't cut his neck when he fell. It certainly would have been painful, but considering the alternative (death), it's preferable. And why else would the director have included a scene of his hands have been released? He could have very well said, "Fuck you!" without his hands being released, so it couldn't have just been for storytelling purposes

The Steam Room is simpler to explain. Debbie could have just used to band-saw to cut the device off of herself. The x-rays were probably placed there to make her think she had to maim William to get the key (like the faux Survival of the Fittest theme in Saw V), even though she didn't.

Finally, in the Carousel Trap, what if there was no limit on the number of times William could have pushed the buttons to raise the shotgun? I can't think of any evidence to support this, but if it were the case, it would have sent the message that the limits on how many people should be allowed to live (a parallel to the idea that some people shouldn't be given insurance coverage) are all an illusion created by the higher-ups (in the case of the trap, the higher-up is Jigsaw; in the case of health insurance, it's William). I know it's a Converse Error to assume that since this moral makes sense, then the possibility that lead to it must be true, but I thought I'd bring it up anyways.

Most importantly, though, remember that Jigsaw said to William, "You think it is the living who will have ultimate judgment over you because the dead will have no claim to your soul, but you may be mistaken." However, at the end of the movie, it is the living (Brent and Tara) who have ultimate judgment over him. Thus, the only way this quote can be relevant is if it is the people who died in the traps (i.e. whom William killed) that are the dead that have a claim to his soul. In other words, had he not killed anyone, there would be no dead to claim his soul, and thus perhaps he would have been saved.

On a side note, since Jigsaw could predict human behavior, perhaps he designed the tape that played at the end of the film specifically to encourage Tara or Brent to kill William. If that's the case, he could have had two tapes ready to play when William made it to the end: one which he knew would cause Brent or Tara to pull the level, and one which would have encouraged them to spare him, or perhaps told William to not stand on the platform that activated the switch, and that one would have played if he had pressed the button in the Carousel trap more than twice, and/or Hank had survived, etc. In other words, maybe William's real test was to find a way to let everyone live, to give up his insurance-based view that some people must die for others to keep living, and he failed that test miserably, and thus his punishment was to die by Brent's hand.

  • I really like this theory — in fact, it improves VI quite a bit for me. Pity no one in the film figures it out.
  • I like this theory as well and to add to it, not just the sewer trap but the entire setup of Saw V could have been fixed through teamwork instead of one person dying. Trap 1: The same key opens all collars. get the key and just pass it down. Trap 2: The explosion-safe spots can fit more than one person in them. Trap 3: All of them hold the cables. Trap 4: All of them should have been alive at that point, so 10 pints between 5 people isn't so horrible.
    • When I said "the sewer trap", I was referring to all four of those traps collectively, since they all take place in a sewer.
  • Just as an additional quirk of this theory: if William had acted in ways that ensured his co-workers' survival, then he'd have had the janitor and Debbie tagging along with him after those rooms. He could have had one of them stick around at the Carousel Trap, punching the button over and over, while he continued onward to find his sister.
  • The carousal part bugged me because I realized that there wasn't any proof that the button only worked once and the fact that there are two buttons might have been a red herring (why not? The acid showers were one too). I like to reimagine that scene where he saves a third person by pushing the button in a futile attempt only to realize that it worked after all.
  • Alternately, William himself can only press each button once, but other people can also press them once each. Therefore, if he'd saved at least two of the previous victims, the other six could have had a chance.

Note: This theory does not necessarily imply the existence of God and an afterlife, but rather Jigsaw's games of life or death look too suspiciously similar to the doctrine of "suffer and have eternal life or give up and have eternal death".

Throughout the series, the philosophy of Jigsaw is that those who do not appreciate life do not deserve it. Endure some pain and survive or suffer eternal death. Remember that John tried to commit suicide, yet failed and thus became enlightened? Because of that incident he realized that the human race have grown sinful, living just because life contains pleasure, and because of that realization, he decided to "purge" humanity of their sin. After that, he created contraptions which purpose is to rehabilitate people by imposing Ironic Hell upon them, let them choose on their own free will to either endure and lose the things that made them sin, or to give up and choose death, and if they do survive, make them appreciate life as something in itself. Taken from a more biblical perspective, Jigsaw want them to purge them of sin and rehabilitate them in a way that they can see life as something to be glorified and appreciated in itself, not just because life contains sins and vices and pleasures and obsessions. He was imposing judgement on those who deserve eternal life in Jigsaw and those who deserve eternal death. He was trying to create a Purgatory, one person at a time. After all, Jesus did say "If your right eye causes you to sin (which the wage for is death), gouge it and throw it away" (which reminds this troper of the game in Saw IV where the guy was forced to either blind himself for being a rapist or be ripped apart).

The end of Saw 3D is the end of the beginning for the Jigsaw movement, not the beginning of the end.
Afterwards, the Jigsaw philosophy slowly gains recruits, eventually being a considerable cult and even taking over small villages. After a century, it's one of the most powerful forces in America and has outlets in other countries. A little while later, and soon there are Jigsaws EVERYWHERE (deverywhere, deverywhere). Every household in America gets tested (gets tested, gets tested). It becomes bigger than hula hoops (hula hoops, hula hoops). Eventually it is the leading cause of death in the world and not a single person goes through their life without undergoing a Jigsaw trap. Of course some would prefer being Driven to Suicide than to endure the traps. Quality of life declines and people forget what they knew, as slowly the Jigsaw become a seperate, more powerful class than the Non-Jigsaw. They're worshipped as gods, and scientific knowledge shifts to being exclusively the domain of the Jigsaw, as the Jigsaw do research into new traps and execute the Non-Jigsaw scientists for stupid reasons. Eventually the Jigsaw create AM from I Have No Mouth, and I Must Scream, who kills the Jigsaw and most of the Non-Jigsaw, but still tries to perform his function...
  • Alternatively, The Jigsaw and their ideology of rehabilitation ends up in the hands of The Party from 1984. The Party successfully uses the Jigsaw rehabilitation methods and John Kramer's spying/surveillance abilities (well, after all, how can you have an Ironic Hell without a knowledge of people's personalities)? to design the Ministry of Love, and the purpose is twisted so that the purpose of the traps are not to make people appreciate life, but to make people appreciate Big Brother.

Lawrence was always a Jigsaw Apprentice.
Dr. Gordon was a follower of John's from the very beginning. Before Amanda converted, before Hoffman was blackmailed, he was there. His Test was intended to accomplish two main goals. His final Apprentice Exam, just like Amanda and Hoffman were intended to be given; and to cast him from the list of suspects. He'd been suspected already, and as things continued there was no guarantee they'd take a second look at him later. So he was put into a Test. If he died, Game Over. If he survived, he could either be a publicly traumatized survivor, or as happened, he could disappear as Missing Presumed Dead.

John was fully aware of Amanda's role in his son's death.
In Saw V, we learn that Hoffman threatened Amanda with the knowledge that she was there when John's son died, one of the events that led him to become Jigsaw in the first place. Because of this, Amanda was forced to blow her last test and kill Lynn Denlon instead of following Jigsaw's direction to release her. The tragic irony of this all is that John was already perfectly aware of this fact, but had never brought it up because Amanda had rehabilitated herself in his tests. In fact, this was the irony of Amanda's reverse bear trap test, though she did not recognize it as such. She had previously killed by proxy and now, to survive, she had to kill willfully. That's the reason her "cellmate" was still alive.
  • Confirmed implicitly: In the video game Saw II: Flesh & Blood, Cecil Adams' journal entries are scattered around and it mentions Amanda's role in the death of Gideon. The entries had been obtained by Detective Tapp after Cecil's death. Hoffman could have gotten ahold of them and then shown them to John. It may have been John who told Hoffman to "blackmail" Amanda into killing Lynn Denlon. After all, he told Amanda that there was something in the drawer for her in Saw III. He may have wanted to see if Amanda would remain a killer or if she would succeed her test and tell him the truth.

Bobby Dagen's traps were not devised by either John or Hoffman
I haven't gotten up to Saw The Final Chapter yet, so I acknowledge that there may be something within the movie itself that contradicts this. However, I think that Bobby's traps were not created by John (who was implied to have finished his last traps in Saw VI), nor by Hoffman (who was otherwise preoccupied with a Roaring Rampage of Revenge). They are, in fact, the creation of Dr. Gordon. The logic behind this surrounds the lesson he himself learned: Empathy. Bobby was a charismatic self-help guru, but he was only using Jigsaw survivors to make himself some cash. He wasn't tested just because he was posing as a fake victim, he was tested because he was posing as a fake healer on top of it. By running Bobby through his tests, he experienced exactly what any Jigsaw victim would, leaving him to better empathize with the people he was claiming to want to help. To take this even further, the ultimate goal of making Bobby a true victim is to make him better able to stabilize other survivors, help them realize Jigsaw's message, and become more appreciative of their life after the trauma of a trap. This could also improve the recruiting potential for bringing survivors in the Jigsaw world, as they're less likely to have been pushed as far as Amanda or Hoffman were with proper counseling.

When he first created the franchise, Leigh Whannell was inspired by the first 7 volumes of the Yu-Gi-Oh! manga.
Think about it. Both Jigsaw and Atem like to play games with their victims in order to show them the error of their ways. If the victim loses, they get a Karmic Death (or karmic punishment in Yu-Gi-Oh!'s case). The only real difference is that Atem is an Anti-Hero while Jisaw is an actual villain... well that and Atem has supernatural powers.

Jigsaw's psychosis had a valid medical cause.
As the series unfolds, we discover that John Kramer had cancer in his brain, specifically in the frontal lobes. It is widely believed that the frontal lobes are responsible for one's moral compass, and damage to that area can cause drastic changes in personality, turning a perfectly decent man into a complete Jerkass (look up Phineas Gage for an example). So, while his master plan for reforming humanity one ungrateful bastard at a time did have noble roots (albeit those triggered by anger), as the cancer progressed it started affecting his personality and morality, turning a Well-Intentioned Extremist into a Knight Templar.

Jigsaw is an Alternate Universe version of Doctor Steel.
Both started out as toymakers, but then a tragedy occurred, turning them away from their child-friendly origins into more nefarious avenues via morally-ambiguous engineering projects. However, while Dr. Steel may have started off a bit further off-kilter, Jigsaw had the brain tumor (see above) that wrecked his moral compass, turning him evil. Meaning Jigsaw is the evil version of Dr. Steel, who was a Mad Scientist. Jigsaw turned to deathtraps, Dr. Steel turned to music and world conquest.

Simone becomes an anti-Jigsaw.
Traumatized by her experience and angry at all the survivors saying they learned from their experience, Simone starts abducting good people and putting them in death traps, or maybe just using her job to actively and deliberately ruin people's lives, as a why of defying Jigsaw's message and belief system.

Jigsaw is a filmmaker who made the movies as a warning to the audience.
He has abducted people from the movie theaters whom he believes need to be tested. People do not notice because they are focused on the movie. Additionally, he abducts people in real life and tests their will to live.

Saw is in the same universe as Dead Silence, Death Sentence, and Insidious.
Billy appears as a puppet in Dead Silence, spray-paint in Death Sentence, and a chalk drawing in Insidious. Someone must be a big fan of Jigsaw's work.
  • Or its just a nice nod since all three were directed by James Wan (with Leigh Whannell also participating in some of them)

The video games were designed by Amanda Young.
Thus explaining why they are so difficult and seemingly impossible to live through.

The Saw universe's calendars are different.
The 2005 calendar in Saw II: Flesh & Blood resembles the 2002 calendar. In the Saw universe, the Year of the Pig falls on 2004.

Jigsaw kept Gordon and Tapp captive for nearly a year.
The first Saw movie took place November 2004. "Full Diclosure Report: Piecing Together Jigsaw" takes place the year after. In that in-universe documentary, it is stated that Lawrence Gordon and David Tapp were still missing. In the first Saw video game, Tapp returns home after being tested by Jigsaw in October 2005. The public knew at that time that Tapp was no longer missing since he freed Jigsaw's other test subjects from the asylum, which was mentioned in newspapers. Maybe Dr. Gordon was the one who put the key in Tapp's heart. He was, after all, initially intended to appear in the game. This could have been the test that set him free. He may have been reluctant to accept John's philosophy right after the events of the first film, but maybe he grew to accept them as he was kept alive by John for eleven months, possibly due to Stockholm Syndrome. Helping John with the tests in the video game proved that John could trust him, and Lawrence agreed to help him with subsequent tests.

Saw is in the same universe as The Collector and The Collection.
The Collector was inspired by Jigsaw's traps.

Identity of Pighead from the first Saw video game.
  • Ray Watkins, head custodian.
  • Francis Merkin, head custodian who replaced Ray.
  • A custodian who wrote letters to someone named Marie Whitehurst Asylum. Could possibly be either Ray or Francis.
  • Emma, a patient who reminds a custodian of Marie. Perhaps they had an affair?
  • Daniel Whitehurst IV, M.D., owner of the asylum who said that the government grants do not cover patient needs.
  • Dr. Holstein, mentioned in a memo to nursing staff.
  • Nurse Cleaver, who believed that patients would get worse and riot despite medication.
  • Dr. Timothy Early, a doctor who might have supported LSD research.

Dr. Holstein or Dr. Early wrote the medical notes in the first video game.
No other doctors are named.

The medical notes were on John Kramer.
The notes mention a wife pregnant with a child, and the behavior described matches John Kramer. Even though it is written that he is 34 in 1998, the doctor could have made a typographical error when he meant to write 44. According to Saw IV, John Kramer was 52 when he died in 2006, so the math adds up if it's a typo. It is also mentioned that the patient fractured his arm from what he described as an accidental fall, possibly alluding to John Kramer's suicide attempt when he drove his car off a cliff.

Conversely, the medical notes were on Lawrence Gordon.
Lawrence also had a wife, and his daughter was 5-6 years old during the first film according to the script. If it takes place in 2004, then Diana being born in 1998 fits perfectly. The notes say that the patient has medical knowledge and comments that "Doctors make the worst patients."

The medical notes are on the person who became Pighead.
The notes mention that the patient sees people as objects or pawns. It is also mentioned that he has violent tendencies. This does not seem to fit with either John or Lawrence's personalities.

Hoffman was the one who kidnapped Gordon.
It was established in Saw III that Amanda was the one who kidnapped Adam. By the time she got to the bathroom, John was applying his make-up and Lawrence was lying on the floor. Hoffman could have contributed to the test by bringing Lawrence while John prepared in the bathroom.

Amanda or Hoffman electrocuted Lawrence and/or Adam.
Zep seemed busy when he was being chased by Tapp.

Lawrence's other possible contributions to Jigsaw's games.
  • Placing the key in David Tapp's heart in the video game.
  • Luring Carla Song to test her in Saw II: Flesh & Blood.
  • He could have used his medical expertise to figure out where to impale Morgan and Rex from Saw IV.

The hooded Jigsaw in the first film was Hoffman disguising his voice.
Pretty much the only way to account for Jigsaw directly using a weapon on someone.

John Kramer wasn't originally an engineer: he was The Philosopher.
He was obviously a polymath, but if he only took up a course in engineering then why did he possess such a comprehensive knowledge about the human condition, human psychology and the survival instinct, which he used to carry out his legacy long after his death? Perhaps being a civil engineer responsible for designing most of the city's infrastructure was not his original passion. Instead, John Kramer's original passion was Philosophy, especially the philosophy behind finding a reason on why a human individual should live despite the circumstances he suffered e.g. the death of his son with Jill. It is entirely plausible that Kramer was a reader of Schopenhauer (who believed that the will to live was the source of all suffering) and Friedrich Nietzsche (where he learned the concept of the Will to Power as fundamental in life) but adopted their philosophies into his own, that for one to survive, they must have the Will to Power in enduring pain to survive. However, in Real Life, Philiosophy is known to be an unprofitable venture, which is why, due to the recognition by others of his skills in engineering, he was forced to enter into becoming one of the most important civil engineers in the city (kinda like Adolf Hitler being forced into architecture even if his original passion was fine arts), and eventually marrying Jill, who as a rehabilitation doctor obviously had an experience in psychology. However, his cancer combined with Amanda's idiocy in aborting his child, convincing him that he has no longer a reason to live,resulted in his suicide attempt, which failed... and reawakened his Philosophical passion in questioning: What does it mean for a human being to survive? This was where Kramer, despite being not a philosophy graduate, decided to use his acquired skills in engineering to express to his subjects what his philosophy of life is.

Telltale Games will make a game based off of the franchise.
Because Telltale seems to be the best at replicating the Sadistic Choice aspect of the films.

William's chooosing only women in Saw VI cost him his life.
It's the only way Brent's behavior makes sense even after watching William's percourse. The policy keeps being referred, but the only two people we saw getting rejected on screen were both men, and he keeps on rejecting men throughout the movie, as none of his chosen survivors are male. This probably convinced Brent that Easton didn't change, or that his father had been rejected because he was a man and thus less deserving of survival over any woman on the planet (Shelby being chosen despite her obvious lying about her family was probably the tipping point). Thus giving him an even deeper conviction that William actually killed his father through malice.
  • Certainly it could be so, but it needn't have to be. Brent may have just been a pissed-off teenager who hated William so much he'd have pulled the DIE lever no matter who the man chose. Either way, it's entirely plausible that Brent could've earned himself a game by his actions, there...

Jigsaw has inspired more people than we see in the films.
There is no doubt by the last movie in the SAW series proper that Jigsaw and his traps have left a profound impact on people and the world at large. But what if it has inspired more people than what we see in the films? Other antagonists in films like the SAW franchise could be a direct result of John Kramer's work including the Social Scientists from The Belko Experiment, The Circle from Unfriended: Dark Web, Noir and their leader Adam from Welcome to the Game, and Minos from Escape Room (2019). They all follow his method even if they don't share his reasons for putting people through torturous trials of survival.

Billy the Puppet's cameos in Whannel's other films are signs of a secret Jigsaw following.
  • Billy usually appears in the form of a graffiti drawing, seen in movies like Upgrade, Death Sentence, The Invisible Man (2020), and The Conjuring (albeit on a chalkboard). While Jigsaw briefly references a twisted "fan-following" for the madman, Billy's face might be their insignia and calling card to hint at their presence. In Upgrade there's even the words "We Are Everywhere" written in the same building as Billy.

Logan, Dr. Gordon, the cult of Jigsaw, and William. None of them remain active beyond their limited games. There will never be a meeting of the minds or any sort of Jigsaw vs Jigsaw battle for the legacy, because none of them are in it for the long haul.
Given that in Jigsaw, the killings are considered a resurgence and not just another in a long series of Jigsaw murders, we can assume that neither Dr. Gordon nor the cult of Jigsaw remained active after taking out Hoffman. Then, in Spiral, we similarly see the killings to be considered a resurgence. This implies that Logan did not stay active. We can assume that William will not stay active either.

The reasoning can be attributed to different things for each person.

  • Logan, while he seemed to be saying he would "speaking for the dead," lost a lot of that passion upon killing Halloran. A sense of closure over his wife's death overcame him, and he simply moved on with his life.
  • Dr. Gordon is a doctor. He already helps people and presumably doesn't feel the need to go further by continuing John's work. Furthermore, he was really just an assistant. He was never taught the engineering or strategic skills needed for being Jigsaw that John taught his other apprentices.
  • Most people who were inspired by John's work simply don't have the guts to participate in that level of torture.
  • William just wanted to deal with his local police precinct. He doesn't have any grander notions like previous Jigsaw killers did.

Some of the criminals in the traps let themselves be killed because they knew they were gonna face the courts if they survived.

The tenth film will be titled "Cross: From the Book of Saw"
It will have a title stylized to still use the Roman numeral X, whilst still maintaining Spiral's new name convention that implies a departure from the previous Saw I-3D (probably also including Jigsaw) saga. Best of both worlds.