Somewhat surprisingly, it is the only Game of Thrones spinoff to receive a series order, despite another spinoff actually going into serious development in 2018, before Thrones had even ended.
HBO is actively working on expanding the world of Westeros on the small screen with a spinoff centered on House Targaryen in the days long before Robert Baratheon’s rebellion, and House of the Dragon will be ready for premiere in 2022.
That spinoff, which would have starred Naomi Watts, reached the pilot stage of development and didn’t get the axe until after the polarizing end to Game of Thrones.