Ever since Game of Thrones finished its Eight Season run back in 2019, HBO has been on the hunt for a successor to its TV-changing juggernaut. Game of Thrones was based on the epic A Song of Ice and Fire fantasy series by George R.R. Martin. Martin's novels are dense with details, myths, and history about his fictional world, so there is no shortage of avenues that spin-off series could explore.
Source：https://www.cbr.com/every-game-of-thrones-spinoff/
