Mike Flanagan Joins Henry Cavill's Warhammer 40,000 Series at Amazon

The long-awaited Warhammer 40,000 live-action television series at Amazon MGM Studios has taken a major step forward. Horror director and writer Mike Flanagan—the creative force behind The Haunting of Hill House, Midnight Mass, and Doctor Sleep—is in final talks to join the project as an executive producer, alongside star and fellow executive producer Henry Cavill . Games Workshop's 2025–2026 annual report and CEO Kevin Rountree's shareholder statement confirm that Flanagan has already completed initial story outlines and is expected to move into full scripting soon .

A Timeline of Progress Since the 2022 Rights Deal

• December 2022 – Amazon and Games Workshop announced an agreement in principle for Amazon to secure global rights to the Warhammer 40,000 universe, with Henry Cavill set to star and executive produce .
• December 2023 – Games Workshop and Amazon finalized the full agreement, entering a 12-month creative guidelines period to lock in the creative direction .
• December 2024 – The creative guidelines period concluded successfully. Deadline reported that the first adaptation would be a live-action television series, officially in development with a writers' room assembled .
• January 2026 – In its financial results report, Games Workshop confirmed the project is "still in development" but warned that productions of this scale take "a number of years," noting that Amazon controls the delivery timeline .
• July 28–29, 2026 – Mike Flanagan entered talks to executive produce. Games Workshop's shareholder report revealed that Flanagan has completed story outlines and that full script work is imminent .

United Artists has formally joined the production partnership alongside Vertigo Entertainment and Amazon MGM Studios, according to reports .

Animated Warhammer Projects in Development for Prime Video

Alongside the live-action series, multiple Warhammer animated projects are now confirmed for Prime Video:

• Warhammer 40,000: Space Marines — Deathwatch – A full animated series written by John Orloff (Masters of the Air, Band of Brothers) and animated by Blur Studio, the team behind the acclaimed Secret Level short film. The series was greenlit for production in July 2026 .
• Warhammer: Age of Sigmar – A standalone animated episode destined for Secret Level Season 2, described by Games Workshop as "nearing completion" .
• Adepta Sororitas: Penitence – A three-part animated series confirmed for 2026, featuring Sisters of Battle, Orks, and Aeldari .
• Aeronautica – A three-part animated series confirmed for 2026, centered on the Imperial Navy .

Who Is Mike Flanagan?

Born in Salem, Massachusetts in 1978, Mike Flanagan is one of the most acclaimed horror filmmakers working today . He graduated from Towson University's Electronic Media and Film program and built his career writing, directing, and editing his own genre films .

Key past work:

• Films: Oculus (2013), Hush (2016), Ouija: Origin of Evil (2016), Gerald's Game (2017), Doctor Sleep (2019), and The Life of Chuck (2025) .
• Television: The Haunting of Hill House (2018), The Haunting of Bly Manor (2020), Midnight Mass (2021), and The Fall of the House of Usher (2023) on Netflix .

Current and upcoming slate (2026 and beyond):

• Carrie – A new Amazon series adaptation of Stephen King's novel, in development .
• The Dark Tower – Holds the rights for a new adaptation of Stephen King's epic series .
• The Exorcist – A reboot film set for release in March 2026 .
• Clayface – A DC horror film co-written by Flanagan, due in September 2026 .
• Warhammer 40,000 – Executive producer; story outlines complete, moving to full scripting .

Flanagan signed an exclusive overall television deal with Amazon MGM Studios in 2023, moving from a five-year partnership with Netflix to focus on projects for Prime Video .