"As for the other successor shows... if you have been following along, you know that we started with four, and eventually went to five", he wrote. "My vote would be The Long Night, which says it all, but I'd be surprised if that's where we end up", he wrote. "But that does not mean the others are dead". George R.R. Martin and Kingsman screenwriter Jane Goldman are producing the still untitled show from Goldman's script, which will be a prequel story set thousands of years before the events of Game of Thrones.
"Yes, this is a prequel, not a sequel". He wanted to reiterate that none of Throne's current characters would be appearing in the spinoff that's been greenlit, since it's a prequel, mining the same universe but going hundreds of years in the past.
Martin also addressed the other prequel series that HBO is considering, which are in various (unhurried) stages of consideration, and come from Max Borenstein, Brian Helgeland, Cary Wray, and Bryan Cogman. Everything I am told indicates that we could film at least one more pilot, and maybe more than one, in the years to come.
Martin, the mastermind behind the captivating Game of Thrones books, has previously said that three out of four prequels would be 'set in different periods and featuring different characters and storylines, remain in active development'.
"Well, assuming the oral histories of the First Men are accurate, but there are maesters at the Citadel who insist it has only been half that long", he joked. But this is television, so nothing is certain, ' he said. He admitted that it's very early in the process since they don't have a director, a cast, a location, or even a title. More likely HBO will want to work the phrase "game of thrones" in there somewhere, ' he said. All of the news stories about the pilot being greenlit are slapping my own picture up there next to Jane's, which is very flattering but also a little misleading Remember, they also slapped my picture up on the news stories about the TV development of Nnedi Okarafor's Who Fears Death, when they should have been using Nnedi's picture. "The accolades here should go to Jane. She has been an absolute thrill to work with. and my god, what a talent".
He has also reassured fans that he is still busy finishing writing the last "Game of Thrones" book saying: "And yes, before you ask, work on "Winds of Winter" continues, and remains my top priority". The spinoff doesn't have a name yet, but Martin did offer on possible title. You can head over to George R.R. Martin's Not a Blog for the full blog post.