Several more Game of Thrones spinoff projects remain in development, creator George R.R. Martin has teased, including "some sequels."

Yesterday, HBO laid out a Marvel-style slate for the future of the Game of Thrones universe, and confirmed multiple upcoming seasons for both House of the Dragon and A Knight of the Seven Kingdoms due for release over the next three years.

Beyond those two shows, however, Martin has confirmed he's helping develop even more projects that are officially "in development" — including plans for multiple series set after Game of Thrones' controversial finale.

"Aside from The Knight of the Seven Kingdoms and House of the Dragon, there are other Game of Thrones spinoff projects in development," Martin said at an event attended by Los Siete Reinos. "Most are prequels. There are several in development, five or six series; and I'm not developing them alone, I'm working with other people. Yes, there are some sequels."

Of course, both of HBO's current Game of Thrones spinoffs are prequels, with House of the Dragon set two centuries before the events of its parent show. A Knight of the Seven Kingdoms is set roughly within the middle of the two, taking place around 100 years before.

Martin has previously discussed other potential spinoff ideas, including an Aegon the Conqueror show (around 300 years pre-Game of Thrones), a scrapped series centering on warrior queen Nymeria (who lived 1,000 years in the past), and yet another abandoned idea, entitled 10,000 Ships, which would have focused on a sea-faring city.

At the same time, the author has been more coy over plans for anything set after Game of Thrones' end — something he's still two books away from reaching himself.

Warning! Spoilers for Game of Thrones follow:

While Game of Thrones' final season is something of a bloodbath, numerous fan-favorite characters remain alive at its end — leaving the door open to several potential follow-ups. Indeed, Jon Snow actor Kit Harington previously confirmed he'd had discussions about returning for his own spinoff, though the idea was shelved after "a couple of years back and forth developing it."

Fans have long hoped for more from Arya Stark, last seen sailing off into the horizon in search of fresh adventures. Last December, Martin even mentioned a meeting between himself and actress Maisie Williams, and teased something as being in the works. "We also got together with Maisie Williams for pizza and pasta, and talked about... Well, no, better not get into that, do not want to jinx it," Martin said. "But it could be so much fun."

Of course, it's worth stressing that countless TV shows described as being in some stage of "development" never actually make it on-screen. HBO spent $30 million filming an entire pilot for its Naomi Watts-staring Game of Thrones prequel idea, before ultimately abandoning the project.

Photo by Craig Barritt/Getty Images for ReedPop.

Tom Phillips is IGN's News Editor. You can reach Tom at [email protected] or find him on Bluesky @tomphillipseg.bsky.social