We may not know exactly what the upcoming Game of Thrones spinoff series are going to be about, but we do know at least one cast member: Naomi Watts. The actress, who has started in films like King Kong and The Ring, will play a “charismatic socialite hiding a dark secret,” according to Entertainment Weekly.
While there are a variety of Game of Thrones spinoffs in the works at HBO, this particular bit of casting appears to be specific to the show that is being developed by writer Jane Goldman, who has written films like X-Men: First Class and The Woman in Black, and A Song of Ice and Fire author George R.R. Martin.
While the exact story of this series hasn’t been revealed yet, HBO has given a brief description of the show, which is set thousands of years before the events of Game of Thrones. It seems the series will chronicle Westeros’ transition out of the Age of Heroes, a peaceful era early in the kingdom’s history, and into the Long Night, when the world was nearly destroyed by the White Walkers and the Night’s King — exactly the forces that returned to threaten Westeros again at the end of the show’s latest season.
We also have a few hints from Martin himself, who wrote in June:
We’re very early in the process, of course, with the pilot order just in, so we don’t have a director yet, or a cast, or a location, or even a title. (My vote would be THE LONG NIGHT, which says it all, but I’d be surprised if that’s where we end up. More likely HBO will want to work the phrase “game of thrones” in there somewhere. We’ll know sooner or later).
Game of Thrones’ final season is set to air sometime next year, which means that any prequel series likely wouldn't premiere until 2020 at the earliest.