Game Of Thrones Prequel – HBO Spinoff Status & Premiere Date Post author:TVReboots Post category:Game Of Thrones / TV Show Prequels / TV Show Spinoffs Tags: Game Of Thrones, Game Of Thrones TV Show Prequel? You Might Also Like Thirtysomething Reboot: Sequel Series From MGM TV In Development September 25, 2019 Roswell & Charmed Rebooted By The CW + Vampire Diaries & Originals Spinoff May 11, 2018 Orphan Black Spinoff Status, AMC Release Date March 13, 2019