HBO’s Lanterns brings Green Lantern mythology down to Earth, following veteran Lantern Hal Jordan and rookie John Stewart as they investigate a murder in rural Nebraska. The series premiered on August 16, 2026, and while Kyle Chandler’s Hal and Aaron Pierre’s John are at the center of the story, Nathan Fillion’s Guy Gardner is already an important piece of the larger DC Universe.
Fillion first played Guy in James Gunn’s Superman, establishing him as one of the DCU’s Green Lanterns before Lanterns ever began. His appearance in the HBO series raises a major question because the show takes place earlier in the timeline.
If Hal is still active and John is only beginning his Lantern career, how does Guy eventually become Earth’s Green Lantern? The answer appears to be tied directly to the mystery surrounding Hal’s fate.
Why Guy Gardner Becomes Earth’s Green Lantern
One of the biggest changes Lanterns makes to traditional Green Lantern mythology is the idea that Earth has only one active Green Lantern at a time. Instead of having several human Lanterns simultaneously protecting the planet, the new DCU treats the position as a single mantle that passes from one person to another.
Hal Jordan has apparently held that position for years. His history as Earth’s Lantern stretches back to the early 1990s and continues into the period when he begins training John Stewart. That makes John’s introduction look like the beginning of a straightforward succession.
The situation becomes considerably more complicated because audiences already know that Guy Gardner is the Green Lantern seen in Superman. His existence means John does not simply take over the position after Hal. Something happens between the events of Lanterns and the present-day DCU that changes the expected succession.
The premiere’s flash-forward reveals Hal Jordan dead, while John Stewart is shown without a Green Lantern ring. That immediately establishes that the expected transition from Hal to John does not happen. Tom King, who co-created the series, confirmed the significance of the scene while discussing Lanterns: The Official Podcast, explaining that “Hal is dead” and that John’s hand is shown without the ring because “Guy has the ring.”
The revelation changes the way viewers can approach the entire season. Guy is not simply another Green Lantern who happens to exist somewhere in the DCU. His eventual rise is connected to the central mystery surrounding Hal.
Hal’s death becomes one of the most important unanswered questions. The murder investigation involving Hal and John may initially appear to be a relatively contained case, but the flash-forward suggests that its consequences will reach far beyond the Nebraska setting. Whatever happens to Hal could determine who ultimately inherits Earth’s ring.
It also gives John’s character a more complicated future. He begins Lanterns as the promising recruit being trained by an experienced Lantern, yet the story has already established that he will not simply replace Hal. Whether John loses the ring, chooses to give it up, or becomes involved in whatever leads to Guy’s ascension remains one of the show’s biggest mysteries.
Related: Lanterns’ Dual Timeline Explained: How the 2016 and 2026 Stories Connect
How Guy Connects Lanterns To The Wider DCU
Guy’s role also fits Nathan Fillion’s approach to the character. The actor has embraced Guy’s distinctive comic-book appearance, including the character’s infamous bowl haircut, and has spoken about Guy becoming part of the wider DCU rather than treating him as a one-project character.
At the Los Angeles premiere, Fillion described Guy as becoming “a part of the fabric of this universe” and compared his role to a “mile marker” within the developing franchise. That description becomes especially interesting when considering how Superman and Lanterns fit together.
Superman introduces Guy as an established Green Lantern operating in the DCU’s present-day timeline. Lanterns, meanwhile, takes place earlier and shows Hal still serving as Earth’s Lantern while John begins his training. Guy’s presence therefore gives the franchise a built-in connection between two different points in its timeline.
The character also brings a different personality to the Green Lantern corner of the DCU. Hal is presented as the experienced veteran, while John represents a younger hero entering a dangerous world. Guy, by contrast, is the abrasive and outspoken Lantern audiences encountered in Superman. His eventual possession of the ring creates a deliberately uncomfortable endpoint for the story that Lanterns is beginning to tell.
That makes Guy more important than a simple supporting character. His future status is already established, while the events that will put him in possession of Earth’s ring remain unknown.
For now, the biggest mystery is what happens between Hal’s apparent death and Guy becoming Earth’s active Lantern. If Lanterns follows through on the setup established in its premiere, Guy’s rise could become one of the season’s most important revelations and one of the key pieces connecting the grounded detective story to the larger DCU.