Related: House of the Dragon's Character Names Will Make It Weird For GoT Fans The prequel series will also introduce a new raft of characters. Other key players will be back too, including composer Ramin Djawadi, but while there will be some very familiar elements to the show - including political scheming, epic battles, dragons, and, of course, incest. The first of them will be House of the Dragon, which is being developed by Martin himself alongside Ryan Condal, with the latter set to serve as showrunner alongside longtime Game of Thrones director Miguel Sapochnik. While one, based around The Long Night, has already been cancelled after a pilot episode was shot, there are many more spinoffs in the works. Game of Thrones may have ended in 2019, but Westeros will endure on HBO, which has big expansion plans for the universe. Upcoming Game of Thrones prequel show House of the Dragon has assembled an impressive cast, who will bring to life several key characters - including plenty of Targaryens - from the world of Ice and Fire created by George R.R.