Who Is Lewis Pullman’s Sentry in the MCU?
Marvel Studios has officially confirmed that Lewis Pullman will portray Sentry in both Thunderbolts and Avengers: Doomsday. This marks Pullman’s second MCU appearance, making it clear that Sentry will play a significant role in Phase Six.
The reveal came during Marvel Studios’ March 26, 2025, livestream, where 27 actors were confirmed for Avengers: Doomsday, including Robert Downey Jr. (Doctor Doom), Chris Hemsworth (Thor), and Anthony Mackie (Captain America). Pullman’s Sentry is one of the more mysterious additions, as his character was previously rumored to be the main villain of Thunderbolts.
What Role Will Sentry Play in Thunderbolts?
Thunderbolts (set for release on May 2, 2025) will introduce Sentry as Robert Reynolds, a seemingly ordinary man with no memory of his past. In the film’s trailers, he is seen in a hospital gown, unaware of his immense powers. However, his darker alter ego, The Void, looms as a major threat.
Reports suggest that Sentry starts as a government-controlled superweapon before his Void persona takes over, forcing the Thunderbolts team—Yelena Belova, Bucky Barnes, U.S. Agent, Taskmaster, and Ghost—to stop him. Given that Pullman is returning for Doomsday, it seems likely that Sentry won’t be fully defeated in Thunderbolts but rather subdued and repurposed for a larger conflict.
The idea of Sentry being used as a controlled asset by Valentina Allegra de Fontaine, played by Julia Louis-Dreyfus, adds another layer of intrigue. In the comics, Sentry has often struggled with control over his actions, making him a dangerous wildcard. If the MCU follows a similar trajectory, he might be manipulated by external forces rather than being a fully independent villain. The clash between Sentry and the Thunderbolts could also serve as a test of his allegiances, setting up his more significant role in Avengers: Doomsday.
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How Powerful Is Sentry? His Marvel Comics Origins Explained
Created by Paul Jenkins, Rick Veitch, and Jae Lee, Sentry debuted in The Sentry #1 (2000). He is one of Marvel’s most powerful beings, often compared to Superman but with a dangerous twist.
Sentry’s Abilities:
Sentry’s power levels are staggering, making him one of the strongest beings in Marvel Comics. His strength is often described as being equal to that of Thor and Hulk, if not greater. His invulnerability is nearly unmatched, and he has survived planet-destroying attacks. In one comic storyline, he even fought Galactus, showcasing his cosmic-level strength.
Flight and super speed allow him to traverse intergalactic distances in moments, making him one of the fastest beings in the Marvel Universe. His energy manipulation abilities enable him to emit solar energy blasts that can incinerate enemies instantly, and his psionic abilities extend to telekinesis, telepathy, and molecular manipulation, making him a formidable opponent even against characters like Doctor Strange.
However, what makes Sentry unique is The Void, an alternate persona that represents his darkest tendencies. The Void is essentially the physical manifestation of his fears and insecurities, turning him into an unpredictable and destructive force. Whenever Sentry engages in acts of heroism, The Void counterbalances it with destruction, making him a hero constantly at war with himself. This duality adds layers of complexity to his character, making him both an asset and a liability to any team he aligns with.
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What Is Sentry’s Role in Avengers: Doomsday?
With Avengers: Doomsday arriving on May 1, 2026, Sentry’s return suggests he will play a pivotal role in the MCU’s multiversal battle. While his exact role is unknown, there are three major possibilities:
One possibility is that Sentry becomes an ally to the Avengers. Given his overwhelming power, he could be a valuable asset in their fight against Doctor Doom, who is expected to be the main antagonist in Doomsday. If the MCU follows elements from the comics, Sentry might be one of the only heroes capable of countering Doom’s reality-warping technology and magic.
Alternatively, Sentry could emerge as a major threat in Doomsday. If The Void takes control, he could become an uncontrollable force of destruction, requiring intervention from Marvel’s most powerful magic users, such as Doctor Strange, Scarlet Witch, or Loki. The idea of Sentry being manipulated by Doom to serve as an unstoppable weapon against the Avengers is another intriguing angle.
A third possibility is that Sentry meets a tragic end. In Siege (2010), he was ultimately killed by Thor after The Void’s rampage became too dangerous. The MCU could follow a similar route, having Sentry fight against his darker persona and ultimately sacrificing himself to stop Doom’s plans. This could set up Sentry as one of the most tragic characters in MCU history, much like in the comics, where he constantly struggles with his own existence.
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How Does Sentry Fit Into the Multiverse Saga?
With Avengers: The Kang Dynasty no longer being the centerpiece of Phase 6, Doomsday is set to reshape the future of the MCU. Doctor Doom is rumored to take center stage as the primary antagonist, meaning the Avengers will need every available powerhouse on their side. If Sentry is positioned as a potential villain-turned-hero, his story arc could tie into the Fantastic Four, X-Men, and the multiversal war that is unfolding.
The fact that Lewis Pullman was cast after Steven Yeun dropped out suggests Marvel has long-term plans for the character. Pullman’s casting also signals that Sentry is not a one-off villain but a character meant to play a critical role in the larger MCU narrative.
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The decision to bring Sentry into the MCU and retain him across multiple films signals Marvel’s intent to make him a key figure in Phase Six. His power levels rival Thor and Hulk, making him a game-changer in the battle against Doctor Doom. Moreover, his duality—hero and villain—adds layers of complexity, making him one of the MCU’s most compelling new characters.
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