The Aegon's Conquest Game of Thrones spin-off is being developed both as a HBO TV show and as a "mammoth Dune-sized feature film"

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The Aegon's Conquest Game of Thrones spin-off is being developed both as a HBO TV show and as a "mammoth Dune-sized feature film" News By Molly Edwards published 15 January 2026

Aegon's Conquest could end up a TV show or a film

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The Game of Thrones spin-off focused on Aegon's Conquest might be a blockbuster film, or it might be a HBO show.

That's according to The Hollywood Reporter, which says the project "is being developed by HBO as a possible drama series and by the Warner Bros. film team as a mammoth Dune-sized feature film."

Aegon's Conquest refers to the very first King Aegon, who took Westeros with the help of his sister-wives, Rhaenys and Visenya, 100 years before the events of House of the Dragon and 300 years before the events of Game of Thrones. They conquered six of the seven kingdoms, with Dorne retaining its independence until much later.

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In House of the Dragon, it was revealed that Aegon undertook his conquest because he foresaw the end of man thanks to a winter from the North, and a Targaryen would need to be seated on the Iron Throne to bring the Seven Kingdoms together to face the threat. This prophecy is called the Song of Ice and Fire, which is the name of George R.R. Martin's series of novels.

The Aegon's Conquest spin-off was first reported to be in development with The Batman 2 writer Mattson Tomlin attached back in 2024. However, updates since then have been non-existent.

Naturally, this spin-off would feature plenty of dragon action – the trio rode the massive dragons Vhagar, Meraxes, and Balerion – so it would make sense for this particular idea to become the first Game of Thrones movie. But, House of the Dragon and the later seasons of Game of Thrones have already proved that HBO can handle bringing fire and blood to the small screen, too.

In the same report, THR also reveals that the scrapped Jon Snow sequel series might be back in development, too – and, this time, it could end up featuring Arya Stark and be set in Essos.

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Next up for Westeros is A Knight of the Seven Kingdoms, which arrives on January 18 on HBO in the US and January 19 on Sky/NOW in the UK. House of the Dragon season 3 is also coming this year.

For more, check out our guide to all the upcoming Game of Thrones movies and TV shows, or read our four-star A Knight of the Seven Kingdoms review.

Molly EdwardsSocial Links NavigationDeputy Entertainment Editor

I'm the Deputy Entertainment Editor here at GamesRadar+, covering all things film and TV for the site's Total Film and SFX sections. I previously worked on the Disney magazines team at Immediate Media, and also wrote on the CBeebies, MEGA!, and Star Wars Galaxy titles after graduating with a BA in English.

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Logout Read more Upcoming Game of Thrones movies and TV spin-offs in 2026 and beyond    "Most" of the Game of Thrones spin-offs in the works are prequels, but creator George R.R. Martin confirms "some" sequels are still in development    The scrapped Jon Snow Game of Thrones spin-off is reportedly back in development, this time involving Arya Stark    The future of Westeros looks bright as House of the Dragon season 4 and A Knight of the Seven Kingdoms season 2 get confirmed by HBO    A Knight of the Seven Kingdoms: Everything we know about the new Game of Thrones show    Knight of the Seven Kingdoms showrunner says he "did this [season] for George [R.R. Martin]," and the Game of Thrones creator has "only been a benefit to this show"    Latest in Fantasy Shows Everything we know about Amazon's God of War TV show, including the Kratos casting    The scrapped Jon Snow Game of Thrones spin-off is reportedly back in development, this time involving Arya Stark    George R.R. Martin says his A Song of Ice and Fire ending won't be as "happy" as the HBO show's    George R.R. Martin says his relationship with House of the Dragon showrunner is "abysmal"    George R.R. Martin says giving up on final Game of Thrones book The Winds of Winter would "feel like a total failure"    New Kratos actor Ryan Hurst gets the "BOI" approval from God of War's Christopher Judge    Latest in News The Aegon's Conquest Game of Thrones spin-off is being developed as a HBO TV show and as a "Dune-sized feature film"    Mario's new voice actor has "unbelievable respect" for 32-year icon Charles Martinet    Resident Evil Requiem producer says "Leon's counterpart" Grace is easily scared, but the game's stalker is worth fearing    Red Dead Redemption 2 players almost solved a puzzle hidden for 7 years before finding they missed the actual start    "The highest PvE damage output of any weapon" in Arc Raiders was from the Bettina, and that was before its buff    Sony seemingly bans the fourth-biggest publisher on the PlayStation Store, deleting over 1,000 Trophy slop games    GAME REVIEWSMOVIE REVIEWSTV REVIEWS

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