The prequel, created by the Kingsman scribe and George R. R. Martin, takes places thousands of years before the wars, romances and dragons of the Emilia Clarke and Kit Harington-led GoT that wrapped up its blockbuster eight season run earlier this year.
Weaving in issues of race, power, intrigue and White Walkers, the Goldman-run prequel was given the green light back in June of 2018.
Showrunner [Jane] Goldman has been emailing the cast and crew of the project to tell them that the pilot is dead, we hear.