An upcoming Prime Video sci-fi series has the potential to become the biggest shared universe of all time. In recent decades, since the popularity of the Marvel Cinematic Universe, shared universes have often become a goal for major studios and their respective franchises. This has extended to the world of TV, with many streaming services housing shows that link to major theatrical efforts. When looking at some of Prime Video’s best current shows, this becomes clearer than ever.
The Lord of the Rings: The Rings of Power is a big example, given how it establishes a prior period of Middle-earth that existed in the original Lord of the Rings trilogy. When switching genres and looking at Prime Video’s best sci-fi shows, a specific shared universe could become a massive hit for the streaming service. This shared universe comes from an upcoming Prime Video game adaptation, namely the tabletop phenomenon, Warhammer 40K.
Prime Video’s Warhammer Can Be The Biggest Shared Universe Of All Time
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For a while now, Henry Cavill has been attached to produce and star in a Warhammer 40,000 live-action series. Cavill’s love for this franchise has been evident since he became a Hollywood star, making a proper adaptation an exciting possibility. Beyond that, though, the sheer size of the property could lead to the biggest shared universe in cinematic history, which only increases excitement surrounding the series. For decades, Warhammer 40K has been one of the most popular tabletop IPs, with multiple adaptations and stories set within the universe expanding it greatly.
Even the official rulebooks for the tabletop games span back to the 1980s, meaning decades of lore have been crafted for the various factions and worlds of the franchise. This is without mentioning the thousands of books of various sizes set within the same universe, nor the TV adaptations and video game franchises that further expand the franchise. These decades of in-universe lore offer storytellers who are adapting a Warhammer project near-limitless possibilities, which Prime Video’s live-action show will look to tap into.
Undoubtedly, the biggest and most influential shared universe in the TV and film world is the Marvel Cinematic Universe. While Marvel Comics has lasted longer, it has featured several alternate universes and reboots that mean many storylines and characters are reused. Warhammer 40K differs slightly, in the sense that the lore applies to a single, vast entity. With all of this in mind, and the possibilities available to Prime Video should the series be successful, Warhammer 40,000 could rival even the MCU in scale and go far beyond it.
Warhammer Is Finally Showing Encouraging Signs After Flirting With Development Hell
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To put a neat bow on top of all of this excitement, Warhammer 40,000‘s live-action series is picking up development speed after spending years trying to do exactly that. Cavill was announced to be attached to a Warhammer show in December 2022, sparking hype among fans of the franchise. However, the next four years saw little to no movement on the project, be it possible directors, writers, production start dates, or anything else that indicated it was moving forward. Naturally, this raised concerns that Warhammer 40,000 would never happen.
That said, in the summer of 2026, it was revealed that Mike Flanagan had been brought onboard to oversee the scriptwriting process. In the fall of that year, Flanagan addressed Warhammer and the ongoing writing phase. Flanagan supported the shared universe possibilities of Warhammer 40K, insisting that “Warhammer is a fascinating world. The challenge, as anyone familiar with it knows, is finding a way in – it’s so big. There are 700 novels, discounting the [table-top] game, the interactive elements, and so much of the rest of the lore.”
After this, though, Flanagan assured fans that he had overcome this obstacle. The revered horror filmmaker revealed that he and his team had found “a very cool and unexpected on-ramp into it,” and that, despite the secrecy surrounding the project, “he is having the time of my life working on it.” After so many years of development hell, this update from Flanagan, and, indeed, his attachment to the project in the first place, was a welcome shot of adrenaline for those hoping that Warhammer 40,000 will be Prime Video’s next big franchise.
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