George R.R. Martin recently revealed that HBO shelved a Game of Thrones spinoff centered on Braavos, and this series could have done one underwhelming storyline from the original show justice. There are a number of Game of Thrones spinoffs in development at HBO, along with a new Game of Thrones movie in the works from Warner Bros. House of the Dragon is proof that the fantasy franchise can succeed beyond the original story, but not every attempt to expand it has seen the light of day.
