Marvel's upcoming Thunderbolts film remains largely mysterious, but the latest Big Game trailer offers a glimpse into the MCU team-up. While plot details remain scarce, the trailer provides a clearer look at Lewis Pullman as Bob, aka The Sentry. This Superman-esque hero's MCU debut promises significant consequences.
Who is The Sentry, and why is he both the Marvel Universe's greatest champion and its ultimate threat? Let's explore the history of this mentally unstable hero and his potential role in Thunderbolts.
The Sentry: Unveiling Lewis Pullman's Character
The Sentry is arguably the Marvel Universe's most powerful, and most dangerous, superhero. Once an ordinary man, Bob Reynolds, he consumed a serum granting him "the power of a million exploding suns." This immense power comes at a terrible price: a dark alter ego, The Void. For every good deed The Sentry performs, The Void commits an equally evil act. Bob Reynolds' struggle against his inner darkness is a constant, losing battle. Yet, when a powerful hero is needed, none are better suited than The Sentry.
The Sentry's Extraordinary Abilities
The Sentry's abilities stem from an experimental serum, a potential Super Soldier Serum replacement developed after World War II. The serum supposedly accelerates his molecules forward in time, granting him incredible strength rivaling the Hulk and Thor, flight, super-speed, enhanced senses, and near invulnerability. He can also absorb and project energy, enabling feats like energy blasts, teleportation, and subduing a rampaging Hulk. Essentially, The Sentry is Marvel's equivalent of Superman.
As The Void, Bob becomes even more powerful and dangerous. This shapeshifting, demonic entity controls weather, manipulates minds, and has withstood the combined might of the Avengers, X-Men, and Fantastic Four. Even banishing him to the sun proved only a temporary solution.
The Sentry: Key Facts
- First Appearance: The Sentry #1 (2000)
- Creators: Paul Jenkins, Rick Veitch, & Jae Lee
- Aliases: The Void, Golden Man, The Golden Guardian of Good
- Team Affiliations: (formerly) New Avengers, Mighty Avengers, Dark Avengers
- Essential Reading: The Sentry Vol. 1, Age of the Sentry, Dark Avengers, Siege
The Sentry's Hidden Origins
Created by Paul Jenkins, Rick Veitch, and Jae Lee, The Sentry debuted in the 2000 The Sentry miniseries. The series depicts him as a forgotten hero from the Marvel Universe's past, with even Bob Reynolds initially unaware of his heroic past.
Bob's recovered memories bring back The Sentry, along with his nemesis, The Void. The Sentry's history with characters like the Hulk and Fantastic Four is retroactively established within Marvel continuity. It's revealed that The Sentry and The Void are two sides of the same coin, and the world's collective memory of The Sentry was suppressed to protect it from The Void. Bob ultimately repeats this act to contain his dark side, leaving the question of his own memory ambiguous.

The Sentry's Time with the Avengers
While initially a self-contained story, The Sentry became a recurring Marvel character. He joined the New Avengers in 2004, alongside Spider-Man, Wolverine, and Luke Cage. Despite being a powerful asset, his sanity and the threat of The Void remained constant concerns.
During the Civil War (2006), he sided with Iron Man's pro-registration faction, highlighting his awareness of unchecked power's dangers. He also played a crucial role in combating the Hulk in World War Hulk (2007).
However, his downfall began in Dark Reign (2009), where Norman Osborn manipulated him into joining the Dark Avengers. Osborn's gamble to control The Sentry ultimately failed, unleashing The Void in Siege (2010). The Sentry's death followed, though he's since been resurrected and killed again. The 2023 The Sentry series explores the search for a new host for his power, and the burden of The Void.

The Sentry's Role in Thunderbolts
Beyond a few mobile games, The Sentry's appearances outside Marvel comics have been limited. Lewis Pullman's casting marks his MCU debut. He won't star in a solo film or series (yet), instead appearing in 2025's Thunderbolts, alongside Bucky Barnes, Yelena Belova, and Red Guardian.
His exact role remains uncertain, but his comic book history suggests a portrayal emphasizing both his heroic and villainous potential. Will he start as a Thunderbolt, only to become their worst enemy? His power level significantly surpasses the rest of the team, making a confrontation a monumental challenge.
The Thunderbolts: A History of Marvel's Unstable Team

11 Images



Contessa Valentina Allegra de Fontaine might play a role similar to Norman Osborn's in Dark Avengers, exploiting The Sentry's power before losing control. If Thunderbolts mirrors Suicide Squad, The Sentry could be the film's Enchantress equivalent.
The film's handling of The Sentry's forgotten past and his relationship with other heroes remains to be seen, as does the extent to which he'll be portrayed as a Superman analogue. More details will emerge closer to Thunderbolts' May 2025 release.
Note: This article was originally published on November 17, 2023 and updated on September 23, 2024 with the latest information about Thunderbolts*.