Board Thread:General Discussion/@comment-26923997-20160820130303/@comment-5308269-20160820215925

There is a Targaryen precedent for legal polygamy in the form of Aegon the Conqueror and his queen-sisters, Visenya and Rhaenys. And the mere fact that the pregnant Lyanna Stark was being guarded by two Kingsguards up until Ned found her is highly suggestive that Jon may be a legitimate scion of House Targaryen. And if he is, then Jon has a stronger claim to the Iron Throne than he ever had for Winterfell and the Kingship of the North.

In any case, he was already reluctant to be king of the latter, and judging by visions experienced by both Daenerys (House of the Undying in Season 2) and Bran (greensight vision in Season 4), the burnt out ruin of the Red Keep in the heart of winter suggests that the Seven Kingdom's days as a unified realm may be over and the Iron Throne's future as an irrelevancy.