Game of Thrones earned massive praise for its immersive worldbuilding. Fans felt transported to Westeros, from its geography to its politics. Though the series felt like a comprehensive walk through the well-realized fantasy continent, the franchise has more to offer than its original run. HBO will produce several planned spin-offs to explore new characters, events, and historical periods. A Knight of the Seven Kingdoms is set to start filming this spring with a world of source material to pull from.