I think Jon Snow and Daenerys Targaryen need to get together and rule the 7 Kingdoms..
I cried like I have never cried over any movie or show when they killed Jon Snow.. I don't believe he is dead or at least am hoping he will be brought back.
I don't see how it is even logical for this whole theory on Jon Snow's real birth parents being Lyana Stark and Rhaegar Targaryen, It was established already when Ned Stark stumbled upon the evidence proving that Joffrey Baratheon was not indeed King Robert Baratheon's real son, the evidence was that whatever the fathers hair color was it was always passed down to his children. The Targaryen's have Blond hair, And Jon Snow has Black curly hair.. So Rhaegar Targaryen can not be the father of Jon Snow.
It also would not make sense why Ned Stark would let his Wife live hating Jon Snow all those years, and resenting Ned for being unfaithful if he was not indeed Jon's real father. Even if it was for the protection of his sister if she had indeed been the mother. He would have been able to at least tell his wife because they had a bond that he would have known she would keep it a secret.