HBO’s programming president Casey Bloys told Entertainment Weekly, that HBO is talking to writers about possible Game of Thrones prequel series. Saying that“It’s such a big property we would be foolish not to explore it, but it’s a pretty high bar. We’ll take some shots at it. I’m not going to do it just to do it. It has to feel very special. I would rather have no sequel and leave it as-is then have something we rushed out.”
Bloys also noted that a prequel seems more likely than a spin-off series that uses already existing characters. “A prequel feels like it has less pressure on it. [George R.R. Martin’s history of Westeros] gives you areas in which to say to a writer, ‘If you were going to do this, then go flesh it out,’ and we’ll see what comes back. But I don’t feel any pressure that we have to have something.”
And despite that GoT showrunners David Benioff and Dan Weiss previously told EW that they want to cap the series at 73 hours, with 7 episodes this season and 6 next (final) season. Bloys told EW that the GoT bosses are still pondering about how many episodes season 8 will include. “They’re still figuring out the shape of the season, what they want to do,” Bloys said. “I’ll take as many as they want to do. If they give me eight, I’ll want 10. But it’s really up to them. They’ll let me know.”
Season 7 of the series will air this summer, instead of April. Because production needed to start later, so they could film in more wintery locations.