Kit Harington seems to be willing to give up his time in Westeros last week. Last week, HBO was preparing a sequel spinoff series about Jon Snow, according to Martin, but Martin did not provide further details, suggesting that fans should look out for an official HBO announcement instead.
Snow''s sequel series has been given the working title of Snow, and will apparently focus on Jon Snows following the events of the HBO series Game of Thrones. In an interview with the BBC, Emilia Clarke said Harington had told her about the episode, and that he was heavily involved from top to bottom.
Martin confirmed this as well, stating that the series was Haringtons idea. Martin also stated that Harington chose the writers and showrunners for the series, and that the actor and his team traveled to New Mexico to collaborate with the Martin and Martins team to develop the series'' story and theme.
Martin, who is now a TV veteran, is cautious to note that this series is only in development at the moment and not officially greenlit. That means this show will still get made, or may get a pilot but there is no series order, according to the Game of Thrones Long Night prequel.
Snow is the fourth live-action Game of Thrones spinoff currently in development. There are also a series called Ten Thousand Ships, and a series called Sea Snake (or possibly nine Voyages) as well as the Dunk & Egg series, which will either be called The Hedge Knight or A Knight of the Seven Kingdoms. There are also several animated Game of Thrones projects in the works.
None of these series, which is still using working titles for the time being, have been officially greenlit yet, and will likely depend on the success of House of the Dragon, which is set to launch on HBO in August.
If this series does not arrive at the light of the day, it will probably not last for a long time, especially since we do not know anything about the writer or showrunners just yet.