Mike Flanagan Calls Amazon’s Warhammer 40K Series a ‘Brutally Difficult Adaptation’

Most book series give a writer a front door. Warhammer 40,000 has about a thousand, and the man writing Amazon’s version of it says that’s the whole problem.

Mike Flanagan, the horror writer and director behind Midnight Mass and The Haunting of Hill House, talked about the project on the podcast The Process Unlocked, hosted by Jenelle Riley. He said he feels like he’s “climbing my adaptation Everest,” and called Warhammer a “brutally difficult adaptation,” while adding that it has been fun. The interview was reported this month by T-Break and FRVR.

The reason he gives is the interesting part. According to T-Break’s write-up, Flanagan compared the job to his planned adaptation of Stephen King’s Dark Tower books. King built that story to open with two people in an empty desert and add the wider universe one brick at a time, so a screenwriter has an obvious place to start. Warhammer doesn’t work that way. The setting is thousands of years of war, with hundreds of novels and a crowd of characters, and no single character or scene that tells a newcomer what the whole thing is. As Flanagan puts it, the challenge is how you get in. That comparison is T-Break’s summary of the interview, not a direct quote, so read it that way.

Here’s what is confirmed and what isn’t. Amazon MGM Studios holds global rights to Warhammer 40,000 from Games Workshop, a deal T-Break dates to December 2024. Henry Cavill has been attached to star and executive produce since 2022, per TheWrap, and T-Break reports he has said he will take the lead role without naming the character. TheWrap reported on July 28 that Flanagan was in talks to write, direct and run the show, and said Amazon declined to comment. The Playlist reported the same week that Games Workshop’s own financial report named Flanagan as the writer, and noted it wasn’t clear whether the project would be a series or a film. T-Break adds that the same report says initial story outlines are done and scripting is next. We haven’t found any announced release date or premiere window.

So what does this mean for the people at the table? Quite a lot of viewers will meet 40K through this show before they ever see a Space Marine on a battle mat. Whichever corner of the setting Flanagan picks to be that front door will shape what those newcomers think the game is. Pick a single squad’s story and it reads as a war drama. Pick an inquisitor in a decaying hive city and it reads as horror. Flanagan is known for horror, and plenty of fans are hoping for exactly that, but that is a hope, not an announcement. We don’t know which story he has chosen, and nobody outside Amazon and Games Workshop has said.

The fair worry is the opposite one. A story that has to explain everything to a newcomer can flatten the setting into a few catchphrases, and long-time players have watched that happen to other franchises. A writer who calls the job brutally difficult at least seems to understand the risk. We’d rather hear that than a promise that everything will be faithful.

If you’d like to start from the same place many players did, Horus Rising by Dan Abnett is the first book of the Horus Heresy series, set at the start of the setting’s long war.

The open questions are the ones that matter: the story, the format, the cast beyond Cavill, and a date. We’ll check back when Amazon or Games Workshop confirms any of them.

Header image: Photo by Martin Lopez, via Pexels.