George R.R. Martin
“‘10,000 years’ is mentioned in the novels,” Martin said. “But you also have places where maesters say, ‘No, no, it wasn’t 10,000, it was 5,000.’ Again, I’m trying to reflect real-life things that a lot of high fantasy doesn’t reflect.”
While this is a significant decrease from the original time estimate, the story is still set before the rise of Valyria, the city in which the House Targaryen originated. "Westeros is a very different place," Martin added. "There’s no King’s Landing. There’s no Iron Throne. There are no Targaryens — Valyria has hardly begun to rise yet with its dragons and the great empire that it built. We’re dealing with a different and older world and hopefully that will be part of the fun of the series.”
We hope to get more information about the series, rumored to be titled The Long Night, soon.