Jon Snow in the books does not have black hair. He has medium brown hair, like Ned and Arya. Also, this theory has already been explored and the timing does not match. Not because of Ned finding Lyanna dying, nor because of Jon's age, which is practically the same as Robb. In your scenario, Jon would be a year or two older, and Cat arriving at Winterfell with baby Robb would immediately realize that Robb is a baby and Jon walks and talks. Also, Ned would not have named his firstborn after his sister's rpst.

Basically, do you think WoW and ADoS will be identical in every way to the last two seasons of the TV show, just with more pages of food descriptions? It would explain why Martin gave up: who wants to end a life's work with an ending that you know for sure will disgust 95% of your audience? People didn't like the ending itself, not just how you got there.

It's obvious that they're trying to please the diversity advocates, but the paradox is that the various "minorities" will probably boycott the product on principle, since they no longer approve of JKR now that she dared to express an opinion contrary to theirs, as if she had a duty to confirm the opinions that her "fans" projected onto her.