James Gunn Finally Puts Peacemaker’s Martian Manhunter Theory to Rest
James Gunn just put the Peacemaker Season 2 Martian Manhunter rumors to bed, debunking the fan theory and confirming the Justice League icon doesn’t appear in the new season.
File this under: fun fan theories that just ran into a brick wall. James Gunn just shut down the idea that Peacemaker Season 2 secretly introduced the DCU version of Martian Manhunter.
So is Langston Fleury Martian Manhunter?
No.
Answering a fan on Threads, DC Studios co-CEO James Gunn confirmed that Tim Meadows' A.R.G.U.S. agent Langston Fleury is not the green telepath hiding in plain sight.
"He's not."
Gunn also seemed baffled by complaints that the Peacemaker Season 2 finale lacked big swings, pointing out that the episode actually rolled out some hefty DC lore.
"I don't get that people don't think there aren't big reveals here, including Checkmate and Salvation."
Why fans were convinced in the first place
- Fleury has a running bit where he can't tell different birds apart. Some viewers read that as an alien-trying-to-parse-human-life quirk, which screams Martian Manhunter vibes.
- In Gunn's Superman, Lex Luthor drops a line to Clark: "Tall, dark, and Martian aren't my thing." That sounded like a cheeky nod that J'onn J'onzz exists in the DCU.
- There's precedent: in the DCEU, Zack Snyder revealed Harry Lennix's character was secretly Martian Manhunter, so fans suspected Gunn might pull a similar slow-burn reveal.
What Gunn pushed back on
Beyond the simple "not him," Gunn highlighted that Peacemaker's finale did deliver major pieces, specifically name-dropping Checkmate and Salvation. If you know your DC comics, those are not small potatoes. The show is still very much John Cena's circus, but it is clearly threading in larger-universe stuff.
So where does that leave Martian Manhunter?
Not in Peacemaker Season 2 as Langston Fleury, per Gunn. Whether and when J'onn shows up in the DCU is still a mystery. For now, chalk this theory up as debunked and keep an eye on the broader DCU rollout.
Timing note: Gunn's responses hit Threads and were circulated by Superman Saga News on October 14, 2025. Originally reported by Apoorv Rastogi on SuperHeroHype.