Yet another Game of Thrones spinoff show may be in the works. According to The Hollywood Reporter, HBO is working with The Batman writer Mattson Tomlin on an Aegon's Conquest project.

Tomlin worked on The Batman but was uncredited; he's also co-writing the sequel with director Matt Reeves. Tomlin also wrote the Keanu Reeves film BRZRKR.

Aegon's Quest is described as a "direct prequel" to House of the Dragon. It would focus on the Targaryen house's conquest of Westeros, led by Aegon Targaryen. If all of this sounds familiar, it's because Variety reported many months ago that HBO was considering an Aegon's Conquest series.