There are still a couple books to come in George R.R. Martin’s A Song of Ice and Fire, but the author says some fans have already figured out the secret ending. A lot of people have theories about how the story will end, and Martin has been paying attention to what people post on the internet.
Speaking with the Telegraph, he confirms some people have figured it out:
“I’ve wrestled with this issue, because I do want to surprise my readers. I hate predictable fiction as a reader, I don’t want to write predictable fiction. I want to surprise and delight my reader and take them in directions they didn’t see coming. But I can’t change the plans. That’s one of the reasons I used to read the early fan boards back in the 90s but stopped. One, I didn’t have the time, but two is this very issue. So many readers were reading the books with so much attention that they were throwing up some theories and while some of those theories were amusing bulls— and creative, some of the theories are right. At least one or two readers had put together the extremely subtle and obscure clues that I’d planted in the books and came to the right solution. So what do I do then? Do I change it! I wrestled with that issue and I came to the conclusion that changing it would be a disaster, because the clues were there. You can’t do that, so I’m just going to go ahead. Some of my readers who don’t read the boards, which thankfully there are hundreds of thousands of them, will still be surprised and other readers will say: ‘see, I said that four years ago, I’m smarter than you guys’.”
It’s possible he’s talking about the “L+R=J” theory that says Jon Snow is actually the son of Lyanna Stark (Ned’s sister) and Prince Rhaegar Targaryen, making him Ned’s nephew and not his bastard son. It would also make him Daenerys’s nephew. As Martin has usually danced around calling Jon a bastard himself, people believe this theory could have weight. However as it’s a very popular theory, it’s definitely more than just “one or two” readers like Martin says.
I wonder if this was GRRM’s reaction when people figured it out: