Before the Game of Thrones TV show House of the Dragon, which premieres August 21, HBO was making a different Game of Thrones show starring Naomi Watts with the working title Bloodmoon. HBO reportedly spent as much as $35 million to film the pilot before canceling the show. People connected to the show have now commented on what made the show appealing in the first place and also why it didn't end up going anywhere.

HBO executive Francesca Orsi told The Hollywood Reporter that the show was "very adult" from a tonal perspective. Orsi also described it as "sophisticated and intelligent," adding that the show would have featured a "thematic conversation at the center of it about disenfranchisement in the face of colonialism and religious extremism."

Jane Goldman, who wrote Kick-Ass and Kingsman: The Golden Circle, was to be Bloodmoon's showrunner. It was going to be set in the years before Game of Thrones, taking place in the Age of Heroes and The Long Night.