We Finally Know Why Guy Gardner Became the DCU’s Green Lantern Over Hal Jordan

Nathan Fillion’s Guy Gardner has quietly become one of the most important pieces of James Gunn’s DCU puzzle, and ‘Lanterns‘ just gave fans the clearest answer yet as to why he ended up wearing the ring in the present day. Thanks to ‘Superman’, fans already know that Guy has become a Green Lantern and co-founded the Justice Gang by the present day DCU in 2026, setting up a larger mystery of succession, especially since John Stewart was already being trained as Hal’s replacement. That timeline collision is exactly what ‘Lanterns’ has spent its early episodes untangling.

The HBO Max series jumps between 2016 and 2026, and that structure is precisely what makes Guy’s rise make sense. The latest release in James Gunn’s new DCU has revealed a major truth about Nathan Fillion’s Guy Gardner, the Green Lantern who first appeared in 2025’s ‘Superman’, and having debuted as the Justice Gang’s most obnoxious and stubborn member, Fillion’s portrayal of Guy Gardner is remarkably faithful to the character as he’s seen on the page.

Guy Gardner’s DCU Timeline Finally Makes Sense

‘Lanterns’ stars Kyle Chandler as Green Lantern veteran Hal Jordan and Aaron Pierre as trainee John Stewart, with the duo investigating a series of alien murders in 2016 and its consequences in the present. That dual timeline is the key to understanding Guy, because it shows exactly what the Guardians of the Universe were juggling before Hal disappeared from the picture.

The show has already reshaped how casual viewers should read ‘Superman’ in hindsight. Following the release of ‘Lanterns’ episode 3, fans learned quite a bit about the origins of John Stewart, how he was selected to serve as Hal Jordan’s replacement, the Green Lantern Corps as a whole, and a Green Lantern’s role as an intergalactic peacekeeper, and one reveal in particular reshapes how Guy Gardner should be viewed in ‘Superman.’ Essentially, John was always the heir apparent, which raises the obvious question of how Guy ended up with a ring at all.

The answer seems to trace back to a rule the show has been building toward for weeks. The eight episode series features three Green Lanterns in Kyle Chandler’s Hal Jordan, Aaron Pierre’s John Stewart, and Nathan Fillion’s Guy Gardner, as they solve a mystery spanning 2016 and 2026. With Hal’s fate thrown into chaos, the door opened for Guy to step into Sector 2814 in a way nobody originally planned for.

Hal Jordan’s Death Opens the Door For Guy

The inciting incident behind all of this is Hal’s shocking fate. The grand twist on the premise arrived at the climax of ‘Lanterns’ episode 1, in which John found Hal dead, missing his ring. That cliffhanger effectively forces the Guardians to make a decision about who protects Earth’s sector next, and it appears Guy is their answer, at least for a while.

Episode 3 only deepened the mystery rather than resolving it outright. Gardner’s appearance comes right after Hal Jordan was found dead at the end of episode 1 in the 2026 timeline, and the third episode may finally explain what really happened to his character and whether he’s really dead in the DCU or not. The scene in question shows Guy visiting John under strange circumstances that only raise more questions.

That specific moment has fans buzzing across social media. The clip shows Guy Gardner arriving at the Sheridan County Sheriff’s Department to visit John Stewart in jail, and it stops short of clearing anything up. It ends on a note reading REDACTED BY THE GREEN LANTERN CORPS, but it’s enough to confirm that John Stewart and Guy Gardner have history.

Fans have theories about what exactly Guy’s visit means for John’s future in the Corps. It looks as though John has been kept in custody until Guy arrives, suggesting this could be a prisoner transfer, possibly meaning John is being taken to see the Guardians of the Universe directly. That would tie the succession question directly to whatever punishment or evaluation John is currently facing.

Why the Guardians Chose Guy Gardner for the Job

Despite John’s obvious talent, the Guardians appear to have passed him over in favor of Guy, at least in this stretch of the timeline. Episode 2 confirmed John Stewart is a prodigy when it comes to ringwork, having created a bird construct that broke typical Green Lantern rules, and it’s odd the Guardians would let such talent go to waste, yet they picked Guy Gardner for the sector instead of John. That decision is exactly the kind of narrative wrinkle ‘Lanterns’ seems built to explore.

Guy’s rule breaking streak, which made him such a divisive figure in ‘Superman’, is apparently part of what makes him useful to the DCU going forward. Lanterns are instructed not to get involved in Earth conflicts, and Guy Gardner didn’t lie to Lois in ‘Superman’ because he was technically disobeying the Guardians’ orders when he helped the people of Boravia. Fans online have pointed to that willingness to bend the rules as proof he might be exactly what a fractured Corps needs.

There’s also a bigger franchise reason for keeping Guy front and center. Given that next year’s ‘Man of Tomorrow’ is expected to feature both Guy and John, a second Power Ring will likely need to appear from somewhere in ‘Lanterns’, potentially allowing Sector 2814 to have two Emerald Knights working together. That would neatly explain why the show seems reluctant to simply hand Hal’s old ring straight to John.

Guy’s footprint in the DCU keeps expanding well beyond ‘Lanterns’ and ‘Superman’. Fans recently learned Fillion will reprise his role in the ‘Mister Miracle’ animated series, marking his fourth DCU appearance, a strange but deliberate choice meant to add connective tissue across the wider universe. With no single overarching villain driving the DCU yet, that kind of character overlap is clearly doing a lot of the heavy lifting to make the franchise feel unified.

What This Means for John Stewart’s Future

None of this necessarily spells doom for John Stewart’s own Green Lantern arc, but it does complicate it. The DCU currently doesn’t have much of an overarching narrative or supervillain brewing behind the scenes, so having overlapping characters like Guy is crucial to ensuring the universe feels cohesive. That suggests Guy’s promotion is less about sidelining John and more about giving Gunn’s team flexibility across multiple projects.

Nathan Fillion himself has embraced his growing role with characteristic humor. Actor Nathan Fillion recently joked about his increasing involvement in the DCU, saying he doesn’t know if he’s an anchor being, describing his character as the thread that weaves throughout the fabric of this universe. That kind of connective presence lines up with everything ‘Lanterns’ has been building toward.

For now, ‘Lanterns’ continues to tease rather than confirm the full explanation, with new episodes rolling out weekly and each one adding another layer to the Hal Jordan mystery. Between the prison visit, the redacted footage, and Guy’s expanding resume across the DCU, it’s clear this was never a random casting choice but a carefully engineered piece of Gunn’s larger plan.

Do you think Guy Gardner deserves to hold onto his ring once John Stewart’s true fate in ‘Lanterns’ comes to light, or is this promotion only temporary until Hal’s mystery gets resolved?