A new Sherlock Holmes spin-off series is in development, and according to Comic Basics, this one puts the Great Detective's most dangerous adversary front and center rather than Holmes himself — a bold creative pivot that has the potential to reshape how we experience the entire mythology.
The Villain Gets Top Billing — And That Changes Everything
The Sherlock Holmes universe is littered with memorable antagonists, but two names dominate every serious conversation: Professor James Moriarty, the Napoleon of Crime, and Colonel Sebastian Moran, his cold-blooded enforcer. A spin-off built around either of these figures would be genuinely thrilling territory — Moriarty offers a chess-match intellectual drama, while Moran opens the door to something grittier and more action-driven. The complete absence of Holmes as the lead also means the casting conversation gets flipped on its head. Suddenly, the villain role is the prestige part everyone wants.
For myCast users, this is exactly the kind of project that demands a deep-dive fan cast. Which actor has the menace for Moriarty? Who carries the cold military precision Moran requires? The fandom has opinions — and the platform data proves it.
What myCast Fans Are Already Saying
The Holmes fandom on myCast has been busy across multiple fan-cast stories, and the picks reveal some genuinely fascinating consensus — and a few surprises worth debating.
Across three active Sherlock Holmes fan-cast stories, two names keep surfacing for the villain slots. Ralph Fiennes has earned votes for Professor Moriarty in both the Sherlock Holmes story and the Sherlock Holmes story — and honestly, it's hard to argue. Fiennes brings an aristocratic menace that feels ripped straight from Conan Doyle's pages. He's played manipulative masterminds before, but a full series built around his Moriarty? That's appointment television.
On the Moran front, Michael Fassbender leads the pack with 3 votes in the story for Colonel Sebastian Moran — the most votes any single pick has earned across all three stories for that role. Fassbender's intensity and physical presence make him a natural fit for a former military sharpshooter operating in the shadows of Victorian London. Meanwhile, the story sees cast as Sebastian Moran, which is a genuinely intriguing alternative — Stevens has shown real range between period drama and outright menace.