Mike Flanagan, known for his work on Netflix horror series like The Haunting of Hill House, has described the process of adapting the sprawling Warhammer 40,000 universe for an Amazon TV series as "brutally difficult." Flanagan, who is working under a multi-year deal with Amazon, is set to showrun the Warhammer 40,000 series, which will be part of Henry Cavill's planned cinematic universe for the property.
Flanagan contrasted the challenges of adapting Warhammer 40,000 with his approach to Stephen King's The Dark Tower series. He explained on The Process Unlocked podcast that The Dark Tower's eight-book structure, with its clear narrative progression starting from a simple premise, makes it a more straightforward adaptation. King's genius, according to Flanagan, lies in how he gradually introduces the vast world and lore, allowing the audience to be led in step-by-step. "So my adaptation was that, it was just doing the books and doing them in order," Flanagan stated, noting that the source material largely provides the foundation for his interpretation.
Warhammer 40,000, however, presents a significantly different challenge. With hundreds of novels contributing to its dense lore, spanning thousands of years and featuring countless characters, Flanagan likened the task to climbing "adaptation Everest." He highlighted the sheer volume of material and the lack of a clear, linear starting point as the primary obstacles. "These are novel length," he said. "These are not small. But there are so many characters. It takes place over so many thousands of years. There's so much there. The challenge is how do you get in?"
The Warhammer 40,000 setting, often described as a "grim darkness of the far future," has accumulated decades of intricate lore through Games Workshop's Black Library. This vastness can be overwhelming for newcomers, with popular entry points often suggested to be Dan Abnett's Eisenhorn series, which follows inquisitors on a more grounded detective narrative.
Flanagan's central question remains how to make a Warhammer 40,000 series accessible to a new audience when the universe itself lacks an obvious beginning, middle, or end. The speculative focus on an Eisenhorn adaptation, with its comparatively tighter scope, has been suggested as a potentially more manageable approach for production and viewer entry, despite the occasional appearances of Space Marines. The details of how Flanagan and his team will navigate this complex IP are highly anticipated.