George R.R. Martin Guides New 'Game of Thrones' Prequel Development

Mattson Tomlin receives crucial advice from Martin to avoid past series' pitfalls in 'Aegon's Conquest'

'Aegon's Conquest' is in early development stages, focusing on the first Targaryen king's unification of Westeros.
George R.R. Martin emphasizes treating the story as historical fact to maintain authenticity.
Mattson Tomlin collaborates closely with Martin, drawing from 'Fire & Blood' for the script.
HBO has not yet officially greenlit the series, but development continues.
Other 'Game of Thrones' spin-offs, including 'A Knight of the Seven Kingdoms,' are also in the pipeline.