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Spoilers for Thunderbolts*: the Void is not an unrelated villain. He is the destructive counterpart to Bob Reynolds, the same person transformed into the heroic Sentry by Valentina Allegra de Fontaine’s covert super-soldier experiment. The film’s ending is about Bob regaining control—not the team permanently destroying the Void.
Spoilers for Thunderbolts* follow.
The Void is not a separate villain who merely resembles Sentry. He is the destructive counterpart to Bob Reynolds, the same person whose transformation creates the heroic Sentry. In the Marvel Cinematic Universe, Valentina Allegra de Fontaine’s covert super-soldier experiment gives Bob extraordinary abilities, but it also brings the danger inside him to the surface.
That identity is the key to the film’s ending. The Thunderbolts cannot defeat the Void through a conventional superhero fight because Bob’s power, Sentry’s heroism, and the Void’s destruction are connected. The team ultimately helps Bob regain control rather than permanently destroying the Void.
Who is Bob Reynolds?
Bob Reynolds is the human being at the center of the film’s mystery. Valentina’s experiment is intended to create a replacement for the Avengers: a powerful, controllable super-soldier who can become both a weapon and a public-relations symbol. Instead, the experiment produces Sentry, a nearly unstoppable hero whose darker counterpart is the Void.
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Bob is therefore not simply the man who “summons” an unrelated monster. Sentry and the Void are different aspects or manifestations of the same person. The film presents them as opposing qualities within Bob: Sentry represents protection and rescue, while the Void embodies terror, destruction, and the part of Bob that believes he is beyond saving.
This makes Bob’s condition more complicated than a standard secret-identity twist. There is no ordinary human Bob on one side and an external supervillain on the other. The hero and the threat come from the same transformation and draw on the same underlying source of power.
What is the Void?
The Void is Sentry’s dark counterpart. In the comics, Marvel has traditionally portrayed the Void as a malevolent persona or manifestation that appears alongside the Sentry. The two are deliberately symmetrical: every act of salvation associated with Sentry is shadowed by the Void’s destructive potential.
The film adapts that central duality while giving it an MCU-specific origin. Rather than relying primarily on the comic-book explanation for how Bob became Sentry, Thunderbolts* ties the transformation to Valentina’s secret experiment. The emotional and psychological dimensions are also more prominent in the film, which focuses on Bob’s isolation, trauma, and need to be recognized as a human being.
The Void should not be described as a completely separate alien, demon, or ordinary shadow creature. It can appear as a terrifying darkness, but that appearance does not change what it is in the story: a destructive manifestation bound to Bob and to Sentry.
Why is the Void so powerful?
The Void inherits many of Sentry’s fundamental abilities because the two are connected to the same power. In the film, Sentry demonstrates:
- superhuman strength;
- extraordinary speed;
- flight;
- extreme durability or invulnerability; and
- the ability to survive attacks that the team cannot counter through ordinary physical force.
In Marvel’s comic-book descriptions, the Void is also associated with energy projection, darkness generation, matter manipulation, shapeshifting, mental invasion, and psionic abilities. Those comic powers establish the scale of the character, but they should not be treated as a checklist of abilities already demonstrated on screen. The MCU has not necessarily shown every power attributed to the comic-book Void.
The practical danger is greater than the Void’s visual intimidation. If Sentry is the source of Bob’s ability to protect people, then simply suppressing or destroying the Void could also destabilize Sentry—or Bob himself. The team is facing one extraordinary power with two opposing expressions, not two independent combatants who can be separated by force.
Why can’t the Thunderbolts simply kill the Void?
Because the Void is tied to Bob, attacking it as though it were an outside enemy would not solve the underlying problem. Sentry’s power is too great for the team to overcome by conventional violence, and the Void is not a body standing apart from the person who became Sentry.
The film’s climax consequently rejects the usual superhero solution. The goal is not to overpower the Void until it dies. It is to reach Bob, acknowledge what he is experiencing, and help him recover enough agency to resist the destructive aspect of himself.
This is where the team’s personal connection matters. The Thunderbolts are a group of people who have been used, isolated, dismissed, or treated as disposable. Their willingness to see Bob as a person rather than as Valentina’s product gives them a way to reach him that weapons cannot provide.
That resolution does not mean that Bob is cured in a simple or permanent sense. The safest interpretation is that Bob regains control over the Void. The Void remains an aspect of the Sentry/Bob conflict, rather than being definitively erased from existence.
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What does the ending say about the film?
The Void storyline gives Thunderbolts* an internal conflict that mirrors the team’s larger emotional arc. These characters have been defined by their worst actions, failed missions, or institutional labels. Bob is the most extreme version of that idea: his greatest power and greatest danger are inseparable.
The film’s answer is solidarity rather than purification. Bob does not become safe because the darkness is punched out of him. He becomes capable of acting because other people refuse to reduce him to a weapon or a threat.
This is also why it is useful to discuss the film’s mental-health themes carefully. The story uses divided identities, fear, trauma, isolation, and recovery as dramatic ideas; it is not a literal medical explanation of mental illness. The Void is a superhero-fiction manifestation created by Marvel’s mythology and the experiment in the story, not a diagnosis or a general representation of real-world mental-health conditions.
How does the MCU version differ from the comics?
The film preserves the most important comic-book idea—one person divided between a golden hero and a destructive counterpart—but changes the origin and emphasis.
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|---|---|---|
| Central figure | Robert Reynolds, whose history and identity are gradually uncovered | Bob Reynolds, the subject of Valentina’s covert super-soldier experiment |
| Hero and villain | The Sentry and the Void are linked manifestations of the same character | Sentry and the Void remain connected parts of Bob’s transformation |
| Origin emphasis | The original stories use mystery, memory, and the consequences of Bob’s attempt to erase the Sentry from the world’s memory | The film emphasizes an experimental super-soldier program, isolation, trauma, and interpersonal connection |
| Resolution | The conflict repeatedly returns because the Void is bound to Bob | Bob regains agency over the Void, but the film does not establish that the Void has been permanently destroyed |
In the original comics, Bob’s connection to Sentry and the Void is gradually revealed. One of the foundational ideas is that Bob tried to erase the Sentry from the world’s memory in an attempt to stop the Void. That mystery-driven structure is different from the film’s more immediate explanation through Valentina’s experiment.
The two continuities should not be treated as interchangeable. The MCU is adapting the relationship, themes, and central duality rather than reproducing every detail of the comic origin.
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What does the asterisk in Thunderbolts* mean?
The asterisk is both a joke and a spoiler. After the film’s events, the team publicly known as the Thunderbolts is rebranded as the New Avengers. The mark in the title points to that change in identity.
That rebrand creates an intentional contradiction. The MCU now has a celebrated super-team whose most powerful member is also a person whose greatest threat is internal. Calling the group the New Avengers does not make Bob’s instability disappear, nor does it separate Sentry from the Void. It gives the team a new public identity while leaving the more difficult personal problem unresolved.
Where to start with the Sentry and Void comics
Readers who want the comic-book foundation should begin with the original material, while remembering that it is source material rather than a scene-by-scene explanation of the film.
- The Sentry (2000) #1–5 — Paul Jenkins and Jae Lee’s foundational introduction to Bob, Sentry, and the mystery surrounding the Void.
- Sentry vs. the Void — a direct continuation of the original conflict.
- The Sentry trade paperback — the most efficient physical starting point because the collection brings together the original miniseries and related Sentry/Void material.
- Sentry: Man of Two Worlds — a later collection that explores Bob’s unstable dual existence and the continuing danger posed by the Void.
- Sentry (2026) — later Marvel publishing material showing that the Sentry/Void relationship remains central to the character.
If you want one book after watching the film, The Sentry trade paperback is the clearest choice. It provides the original comic context without suggesting that the MCU’s experiment-based origin is identical to the comics’ mythology.
How to rewatch the film after the reveal
On a second viewing, pay attention to the difference between Bob’s public image and his actual condition. Valentina sees Sentry as a replacement for the Avengers and a controllable symbol. The team gradually sees Bob as a frightened, isolated person whose power has been turned into a political and military asset.
The most important details to track are:
- how the experiment separates the desired heroic result from its destructive consequences;
- the way the team reacts when physical attacks fail;
- the contrast between Sentry’s rescue imagery and the Void’s darkness; and
- the shift from trying to defeat Bob’s power to trying to reach Bob himself.
The physical home release is also relevant for viewers who want additional context: Marvel announced a Thunderbolts* 4K Ultra HD/Blu-ray edition with a dedicated feature focused on Bob, Sentry, and the Void. Availability and pricing can vary by territory and retailer, so check the current local listing before buying.
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Probably not. The film shows Bob regaining agency over the Void, not the permanent destruction of the Void as a separate entity. That distinction matters because the Void is not truly separate from Bob in the first place.
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The comics repeatedly treat Sentry and the Void as a recurring conflict within the same character. The film’s ending leaves room for Bob to function as a hero while preserving the danger that makes the character distinctive.
Is the Void stronger than Sentry?
The Void is not simply a stronger replacement for Sentry. It possesses many of the same extraordinary abilities, but the important advantage is that it represents the destructive side of the same power. Sentry cannot easily defeat it without confronting the part of himself to which it is connected.
Is Bob Reynolds the same character in the comics and the MCU?
Bob Reynolds is the central identity in both versions, and both versions connect him to Sentry and the Void. However, the origin details, continuity, and emphasis differ. The MCU’s Bob is created through Valentina’s experiment, while the original comics build their story around mystery, memory, and Bob’s attempt to remove Sentry from collective awareness.
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Is the Void a separate villain from Sentry?
No. The Void is Bob Reynolds’s destructive counterpart, connected to Sentry as another manifestation of the same person and power.
Does the Void die at the end of Thunderbolts*?
The Thunderbolts help Bob regain agency over the Void. The film does not establish that the Void has been permanently destroyed.
What does the asterisk in Thunderbolts* mean?
The asterisk points to the team’s post-film rebrand as the New Avengers.
Which Sentry comics should I read first?
Start with The Sentry (2000) #1–5, followed by Sentry vs. the Void. The collected The Sentry trade paperback is the most convenient physical starting point.
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The Void is Bob Reynolds’s destructive counterpart, not an unrelated villain. Sentry and the Void are opposing manifestations of the same person and power. In Thunderbolts*, the team helps Bob regain control rather than permanently destroying the Void, while the asterisk reveals that the Thunderbolts have been rebranded as the New Avengers.
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