After making do with Drogon, Rhaegal, and Viserion, there are reportedly 17 or more dragons in the upcoming prequel to Game of Thrones, House of the Dragon. The buzz-worthy new series will be set 300 years before Game of Thrones, adapting George R.R. Martin’s “Fire & Blood,” novels, which, just like A Song of Ice and Fire, are also not done yet. But, Martin is much more involved in House of the Dragon, as with several upcoming spin-offs. At the very least, this guarantees that House of the Dragon will not veer too much from the core of the source material. Much of the details of what we can expect from House of the Dragon remain uncertain. We are sure of the premiere date though. Here’s the official description of House of the Dragon: Unfortunately, HBO hasn’t confirmed the length of each episode of House of the Dragon. If we go by Game of Thrones, each House of the Dragon will run around an hour on average. But, it’s worth noting that HBO reportedly has a higher budget for House of the Dragon than the last season of Game of Thrones. If this is true, it wouldn’t surprise us if each House of the Dragon episode ran longer than an hour, especially the later ones. Either way, it’s safe to say that House of the Dragon episodes will run around an hour on average. If HBO can deliver on the Succession comparisons, then we don’t think anyone will mind the relatively normal length of each episode. Speaking of House of the Dragon, reports suggest that a second season is in development. Meanwhile, George R.R. Martin confirmed that he’s in talks with HBO for spin-offs. Finally, another report claims that a spin-off starring Kit Harrington as Jon Snow is in the works.