Henry Cavill finally gives a Warhammer 40,000 update — and Mike Flanagan is on board

Right, Warhammer 40,000 is actually moving ahead over at Prime Video, and there's finally a bit of news from the only man who owns more plastic miniatures than most fans—Henry Cavill. If you're the sort who keeps score, Amazon bagged the TV and film rights back in 2022 and immediately attached Cavill as both star and executive producer, which frankly surprised no one. He's been banging on about his love for Warhammer for years.

Fresh progress (from the source)

So what's actually going on? Cavill popped up in an Inverse interview and got talking—again—about gaming, but, as usual, Warhammer was right up the list alongside Skyrim and something called XCOM. (He actually went on for a bit, but you get the picture; he's not just pretending to care.)

Asked about the progress on the show, Cavill admitted he can't really say much yet, but did give a bit of a status check. He described the project as 'going really well', and is clearly being obsessive about the details so as not to upset the Warhammer purists—a group that is, let's face it, notoriously hard to satisfy.

Asked by Inverse how the series is coming along, Cavill replied, "Obviously near and dear to my heart, Warhammer. So it's one of those things which I want to make sure is absolutely perfect, and we're protecting the IP whilst also telling the best story we can possibly tell, which will lead to better stories."

Who's actually making it?

Here's the slightly surprising bit: Mike Flanagan has joined the team, which is quite the choice. Yes, that's the bloke behind The Haunting of Hill House and his take on Carrie. Not exactly the most obvious match for grimdark wargaming, but Cavill is all in. He called Flanagan an 'incredible partner' and went on about his enormous talent, so make of that what you will. Flanagan signed on as a writer in July 2026, so things are properly moving now.

A bit of background (for the uninitiated)

For anyone not following every GW update, Warhammer's been around since 1987—originally a table-top wargame before mutating into books, video games, and whatever else Games Workshop could turn a profit from. The IP's always been tricky to make work in any other format, so no surprise Cavill is going full perfectionist.

Prime Video isn't stopping at live-action: there's also an animated Warhammer series being developed, and Cavill is apparently executive producing that as well.

• Amazon bought the Warhammer television and film rights in 2022.
• Henry Cavill is both starring in and executive producing the live-action series.
• Writer/director Mike Flanagan joined as of July 2026.
• Besides the main show, Prime Video have also ordered an animated Warhammer series (Cavill producing).