James Gunn confirms he has started writing his next film during post-production.

Variety reported that Gunn also confirmed on Threads that the assembly cut of “Man of Tomorrow” was complete—an update beyond his earlier remark that he was waiting for the assembly.
The sequel’s cast includes returning actors Rachel Brosnahan, Skyler Gisondo, Sara Sampaio, Isabela Merced, Nathan Fillion and Edi Gathegi; Milly Alcock returns as Supergirl, while Aaron Pierre is set to appear as John Stewart.
A report says principal photography took 93 shooting days. It also describes Gunn’s workload overseeing the sequel as reportedly involving 18-hour days.
Amid Paramount’s acquisition of Warner Bros., David Ellison invited Gunn and DC Studios co-CEO Peter Safran to continue at the company; DC’s film units are to report to Paramount Pictures co-chairs Dana Goldberg and Josh Greenstein.
James Gunn, co-CEO of DC Studios, has already begun writing his next film while waiting for the assembly cut of "Superman: Man of Tomorrow," his sequel to 2025's "Superman." Variety reported that Gunn confirmed the assembly cut is now complete, with the film set to arrive in theaters on July 9, 2027.
Gunn has not revealed what his next project is, but he's clearly juggling multiple creative roles. The "Man of Tomorrow" sequel—featuring returning stars Rachel Brosnahan and Skyler Gisondo alongside newcomers like Aaron Pierre as John Stewart—wrapped principal photography after 93 intense shooting days, during which Gunn reportedly worked 18-hour days overseeing production.
Gunn's announcement marks a key milestone in post-production. Variety noted that his update on Threads went beyond an earlier statement—he's no longer waiting for the assembly; it's done. The director is now deep into the writing phase for an unnamed project, showing his trademark efficiency as both a storyteller and studio executive.
"Man of Tomorrow" will pit Superman and Lex Luthor against Brainiac, the artificial intelligence threat. The cast includes returning leads Rachel Brosnahan, Skyler Gisondo, Sara Sampaio, Isabela Merced, Nathan Fillion, and Edi Gathegi. Milly Alcock returns as Supergirl, while Aaron Pierre joins as John Stewart, expanding the DC universe on screen.
Amid Paramount's acquisition of Warner Bros., David Ellison invited both Gunn and DC Studios co-CEO Peter Safran to remain at the company. DC's film units will now report to Paramount Pictures co-chairs Dana Goldberg and Josh Greenstein. The structural shift consolidates the superhero franchise under one roof as Paramount reshapes its entertainment portfolio.
The "Man of Tomorrow" shoot demanded 93 days of principal photography, with Gunn often working 18-hour days to oversee every detail. Now in post-production, he's already pivoted to writing his mystery next project—a pattern that shows the director's relentless creative pace and commitment to DC's expanding slate of films.
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