I saw someone wrote a meta about Jon x Dany being involved in a second Dance of the Dragons. I personally thought that would be Dany v. fAegon. They said that there's surmountable evidence in the books that to resolve the North's rebellion against Jon bc he's a Targaryen, he would have to marry Sansa. I'm trying to wrap my head around it so can you comment on this theory?
Well, while I do think there’s evidence leading towards a second Dance, you’re right in that it’s leading towards Aegon, not Jon.
A cloth dragon swayed on poles amidst a cheering crowd… . mother of dragons, slayer of lies … (Daenerys IV, ACOK)
“No. Hear me, Daenerys Targaryen. The glass candles are burning. Soon comes the pale mare, and after her the others. Kraken and dark flame, lion and griffin, the sun’s son and the mummer’s dragon. Trust none of them. Remember the Undying. Beware the perfumed seneschal.” (Daenerys II, ADWD)
Aegon is the mummer’s dragon, and Varys (the perfumed seneschal) is the mummer. While Jon and Daenerys both worked to get where they are, earning their roles in the story, Aegon just sort of jumped in out of nowhere. He’s GRRM’s critique of the copy-and-paste chosen one that shows up so often in fantasy. He’s the perfect prince, destined to rule, and he swoops in to take over the storyline that he thinks is the most important: the war for the Iron Throne.
Jon, in many ways, is his stark opposite
(I think I’m hilarious shut up). He’s one of the few characters whose story isn’t involved in the game of thrones, instead focusing on the Others and the threat they present to humanity; he doesn’t actively pursue leadership, nor was he ever specifically prepared for it, but when the situation calls for it he proves himself capable; and, most importantly, Jon knows that he isn’t entitled to anything. Aegon may have been raised around smallfolk, but unlike Jon and Daenerys, he grew up steadfastly believing that he was born to rule.
“She’ll be willing.” Prince Aegon sounded shocked. It was plain that he had never before considered the possibility that his bride-to-be might refuse him. “You don’t know her.” He picked up his heavy horse and put it down with a thump. (Tyrion VI, ADWD)
It’s not Aegon’s fault that he’s been told lies as far back as he can remember, just like it isn’t his fault that he doesn’t have the same experience Jon got in the Watch or Dany got traveling over Essos. He is completely under the impression that he is the son of Rhaegar Targaryen, the Last Dragon, and the rightful heir to the Seven Kingdoms. It just so happens that he’s wrong.
With this in mind, it just wouldn’t make sense for Jon to be the target in the second Dance when Aegon exists. While Jon’s arc parallels Dany’s, Aegon has deliberately been set up to hijack her entire story.
In regards to the Northern lords rebelling against Jon, that would first require that his parentage be made common knowledge, and that seems rather unlikely. Those who know the truth already (meaning Benjen and Howland) have been keeping it secret for years, and I highly doubt Jon will be in a hurry to discuss it with… well, anyone. I know a lot of people think the mystery surrounding his birth is supposed to be a huge game-changer, but that’s not actually the point. The relevance of R + L = J isn’t that it makes Jon royalty, it’s the effect it will have on him. Rhaegar and Lyanna’s history is tragic no matter how you look at it, and its significance will probably be kept between Jon and his family.