Despite the success of House of the Dragon, HBO still has some major hurdles in the way of future Game of Thrones spinoffs. House of the Dragon broke records by drawing nearly 10 million viewers for its premiere, even after the controversial ending of Game of Thrones. Set over a century before the birth of Daenerys Targaryen, House of the Dragon follows the beginning of a civil war between members of House Targaryen.

With viewership rising for House of the Dragon, the future for the Game of Thrones world seems brighter than ever. Yet, despite its critical acclaim and massive ratings, HBO isn't jumping onto another spin-off just yet. In an interview with Variety, the CEO of HBO and HBO Max Content, Casey Bloys, explained that HBO is being very careful about its future spin-offs. Check out his quote below:

“My philosophy is a good script is number one priority. I am not doing it based on wanting to have one a year, two a year. I want to do it based on the scripts that we’re excited about... Remember to get ‘House of the Dragon’ following up from ‘Game of Thrones,’ we developed a lot of shows, shot a pilot, developed a bunch of scripts and we got ‘House of the Dragon.' To do that again is going to take the same amount of effort. You have to develop a lot of things, try things. You never know what’s going to work. So we’re currently doing that. I’m not opposed to any number of shows. There’s probably a natural limit to how many fans want, but I’m open to any as long as we feel really good about the scripts and the prospects for a series.”

Related: Best TV Settings To Watch House of the Dragon's Dark Scenes

What Other Game Of Thrones Spin-Offs Has HBO Been Developing?

House of the Dragon golden crown on a table

While HBO may be ensuring that they are cautious about what they release in the wake of Game of Thrones' poorly received season 8, they are six Game of Thrones shows in development, though some are further along than others. Whether any of them actually make it to screens anywhere remains in question.

One major production is a Jon Snow sequel series, which will feature Kit Harington returning to his role after Daenerys' death and Jon's banishment. Another show, The Sea Snake would follow the adventures of Corlys Velaryon (Steve Toussaint) as he explores the world of Game of Thrones by sea. 10,000 Ships, meanwhile, is another spin-off that also centers around the ocean, as it explores Princess Nymeria's seaward voyage to Dorne hundreds of years before the Targaryen conquest.

There are also multiple animated productions in development, and one will center on the mysterious Eastern nation of Yi-Ti. Some productions have already been canceled, including the spin-off centering around the Long Night, which shot a pilot that even George RR Martin isn't allowed to see. With so many Game of Thrones spin-offs in the works, it's no wonder that HBO has been finding it challenging to develop them all.

More: House Of The Dragon Could Confirm A Major Game Of Thrones Maester TheorySource: Variety