HBO might be giving Game of Thrones fans two more reasons to hold onto those monthly subscriptions.

On Saturday, A Song of Ice and Fire author George R.R. Martin gave his readers a status update about the future of the Realm and revealed that the cable network's planned prequel series isn't the only Game of Thrones spin-off still in development at this time.

While combating so-called internet "reports," Martin wrote, "We have had five different Game of Thrones successor shows in development (I mislike the term 'spin-offs') at HBO, and three of them are still moving forward nicely. The one I am not supposed to call The Long Night will be shooting later this year, and two other shows remain in the script stage, but are edging closer. What are they about? I cannot say. But maybe some of you should pick up a copy of Fire & Blood and come up with your own theories."

Game of Thrones Prequel: Everything to Know

Fire & Blood is a prequel novel set 300 years before the events of Game of Thrones and centers on the history of House Targaryen, including their most important kings and, of course, a few key dragons. Martin previously hinted that the book may serve as source material for a series spin-off in the past, but that was before HBO confirmed that another as-yet-untitled Game of Thrones spin-off would come together first. That series will take place thousands of years in the past and was co-written by Martin and Jane Goldman and was one of four options that were submitted to HBO. The others were written by Max Borenstein, Brian Helgeland, and Carly Wray alongside Martin. Writer and executive producer Bryan Cogman has also revealed that he worked on a potential Game of Thrones prequel with Martin, but HBO declined to pursue that option. No word yet on which of these are still being pursued, apart from that Fire & Blood hint Martin just dropped.

As for why he hasn't been allowed to call the inaugural spin-off series The Long Night? Perhaps it has something to do with the fact that "The Long Night" ended up being the title of Game of Thrones' recent Battle of Winterfell episode, which just so happened to bring the ancient threat of the Night King to an end — at least we think so.

One thing's for sure: Winter isn't coming anytime soon for fans of Game of Thrones because it looks like HBO will be presenting plenty more Westerosian world-building in the near future.

Game of Thrones airs on Sundays at 9/8c on HBO.

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