Brian Helgeland, the Oscar-winning screenwriter known for ‘L.A. Confidential’ and ‘Mystic River,’ pitched a ‘Game of Thrones’ spinoff series titled ‘Ten Thousand Ships’ to HBO. The series would have centered on Queen Nymeria, the legendary founder of Dorne, and her people as they flee their home on a fleet of ships. Helgeland’s pitch was well-received by HBO, but the series was ultimately not picked up due to concerns about its historical distance from the main ‘Game of Thrones’ series. Helgeland remains hopeful that the series could still be produced in the future.