There's been talk of a Game of Thrones spin-off about Aegon's Conquest for a while, but the House of the Dragon prequel is now officially in development – and it's found its screenwriter, too, according to The Hollywood Reporter.
Mattson Tomlin, who did uncredited work on The Batman and is co-writing the upcoming sequel, is on board. He's also currently working on an adaptation of Keanu Reeves' comic book series BRZRKR and an animated Terminator series for Netflix.
