We don't know too much about the four Game of Thrones spin-off series currently in the works at HBO. We know they are confirmed to all be prequels , that no existing characters will be included , and that no potential spin-off will air until after the main series ends with Season 8. One of the spin-offs is being developed by GoT creator George R.R. Martin and Kick-Ass screenwriter Jane Goldman. I chatted on the phone today with Goldman about the series, asking if it will contain any supernatural elements or cover any events or other stories mentioned in the existing books or on the current show. Here's all that she had to say ...

Game of Thrones Spinoff Writers: A Breakdown 17 IMAGES

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Yeah, I think I can say if I was able to say what mine was — yeah, I think as a book reader or as someone who watched the series, you would say, “Oh, that! OK.” Yeah, it would be recognizable as a past event, but I think that’s probably as far as I can go.Yeah, I mean those are things that exist in the universe that George has created and it’s certainly — that’s an aspect that I love so, umm, yeah. (laughs) I’m sure there’s an element of that in anything that’s being developed but, yeah, that’s — I guess so, yeah. I feel like I’m saying way too much! I can say absolutely nothing.Uh, no, I think, yeah, you know what? I think possibly different things at different stages. I think I can comfortably say because George did mention this in his blog that, yeah, I’ve had the pleasure of going to spend some time with him and working on things and talking about ideas and that was an honor and a pleasure. He’s a great guy and we’ve had enormous fun talking about ideas and characters and all sorts of interesting things.Uh, yeah, I totally should not answer that question! And if I were to say that I do, who knows who might torture me for the information?I mean, in terms of what spin-offs will happen, I think nobody knows at this stage of the game, but the sense I get is HBO is very keen to develop something to go on the air sooner rather than later after the series ends, which is why they’ve been in development in earnest I think.Yeah, I think that’s something George talked about in the blog that he did which is to do some really serious development, which I think is a massively important thing to do in television rather than rushing. And, yeah, so I think George outlined sort of the exact plan that’s there so I think better to take it from his mouth than mine.

For more of our coverage of Game of Thrones, read the news about Season 7 Episode 6 leaking online , learn about the history of Rhaegar Targaryen , check out our review of the latest episode "Eastwatch" , catch the latest episode of Dragons on the Wall , enjoy our speculation on what that "Clovis" alias might mean , and find out how you can learn High Valyrian from the linguist who created it for the show.Game of Thrones Season 7, Episode 6 airs on HBO this Sunday, August 20th.