Last month, Martin confirmed that none of the characters or actors from the current Game of Thrones series will be appearing in the prequel since it is set ten thousand years before the events of Game of Thrones.
He also noted that “three more Game of Thrones prequels, set in different periods and featuring different characters and storylines, remain in active development.”
HBO programming president Casey Bloys has announced at the 2018 TCA’s that the network is hoping to begin production on the in-development Game of Thrones prequel pilot in 2019.
The untitled pilot takes the prequel concept to a new level as it is set thousands of years before the events of Game of Thrones.