According to Deadline, House of the Dragon will debut sometime in 2022 - but that's about as specific as HBO is getting right now. On April 26, the official House of the Dragon Twitter account shared an image of a socially distanced table read, with the caption, "Fire will reign. #HouseOfTheDragon is officially in production. Coming soon to HBO Max in 2022."
The first season will draw from George R.R. Martin's novel Fire and Blood and will consist of 10 episodes. As far as anyone knows so far, it's meant to be an ongoing,