The show in question comes from Jane Goldman and George R.R. Martin himself, and is going way back, before Robert's Rebellion, before Dunk & Egg, before The Dance of the Dragons, Aegon's Conquest, and even the Doom of Valyria.
The series is going to centre on the Age of Heroes, which started 10,000 years before Aegon's Conquest (and so roughly 10,298 years before the events of the show begin), and showing us the rise and fall of Westeros, with the official description reading:
"Taking place thousands of years before the events of Game of Thrones, the series chronicles the world’s descent from the golden Age of Heroes into its darkest hour. And only one thing is for sure: From the horrifying secrets of Westeros’ history to the true origin of the white walkers, the mysteries of the East, to the Starks of legend… it’s not the story we think we know.”
It's as exciting an idea as any, albeit with one caveat.
NCTJ-qualified journalist. Most definitely not a racing driver. Drink too much tea; eat too much peanut butter; watch too much TV. Sadly only the latter paying off so far.
A mix of wise-old man in a young man's body with a child-like wonder about him and a great otherworldly sensibility.