4. Fate Of The North
Once Jon is finally let in on his true lineage (remember, as it stands, Jon Snow does actually know nothing) he may have to leave his love nest to negotiate matters closer to home.
It is unlikely that the Northern houses will bow down to a Targaryen ruler. Jon has already admitted as much when he initially refused to bend the knee to Daenerys.
Although Jon is still 50% Stark, the North rises to him because they believe him to be the son of the honourable Ned Stark. They don’t have the same loyalty to his mother, Lyanna.
As for his real father, the same Northern houses who now call Jon King marched against Rhaegar during Robert’s Rebellion. Their fathers or brothers were probably casualties of it. The houses are unlikely to continue to support Jon upon learning this bombshell.
It might be that Jon surrenders power in the North to his cousin Sansa, who has already displayed her willingness to rule. But will the Northern armies still follow Jon into battle against the army of the dead? And will they support Dany’s claim to the throne?