... GAME OF THRONES successor shows, that is.Truth be told, we've had five scripts in various stages of development for months. Which I believe I mentioned...But now at last all the deals are signed, and it can be told. BRYAN COGMAN has come on board to pen the fifth of the successor shows. James Hibberd broke the news on ENTERTAINMENT WEEKLY.Bryan Cogman should need no introduction for any GAME OF THRONES fan. He's been part of the show since the beginning... sincethe beginning, actually, since he was first hired as assistant to David Benioff and D.B Weiss way before the series got on the air, before even the pilot had been filmed. From those humble beginnings, he advanced to staff writer, to story editor, to co-producer and producer and supervising producer. Less formally, he has also been GOT's "Keeper of the Lore," the guy who knew the canon better than anyone (except me, though sometimes I am not even sure of that). He's written more episodes of GAME OF THRONES than anyone but Dan & David... including some of our very best ones. If D&D have been the kings of Westeros for these past seven seasons, Bryan Cogman has surely been the Prince of Dragonstone.I'd love to tell you more about the series Bryan will be working on... but we haven't done that for the other four successor shows, so we shouldn't for this one either. All in good time.I can say that, like the other pilots, it will be a prequel rather than sequel, a successor rather than a spinoff. Bryan's series will be an adaptation, and one that will thrill most fans of the books, I think, set during a very exciting period of Westerosi history. And I'll be working with him every step of the way; we're going to be co-creating the show.Meanwhile, Jane Goldman, Brian Helgeland, Max Borenstein, and Carly Wray are all at work on the other four successor shows. I've been working with them as well (some more closely than others), and I'm excited by some of the ideas they're coming up with. HBO should have a wealth of material to choose from. (And that's not even counting the four weird-ass series concepts I've come up on my own, just for the hell of it. There are eight million stories in the naked city, and maybe ten times as many in Westeros and the lands beyond the narrow seas).You should not expect to see all five shows, though, at least not immediately.. much as I might love the idea, HBO is not about to become the GAME OF THRONES network... but we could possibly see two or even three make it to the pilot stage, with one series emerging on air in 2019 or 2020... and the others maybe later, if they come out as well as we all hope. Then again, maybe... but I should not speculate, you folks get WAY too excited. Truth is, no one knows. Least of all me.For now, suffice it to say that Bryan Cogman has signed on, and we're thrilled.