Game of Thrones introduced two fan-favorite characters this season — Jon Snow and Daenerys Targaryen — giving heat to a theory we had previously had, especially since Melisandre says that she brought together ice and fire. To understand why this is so significant to the very core of this story, we have to talk about the theory. It's about the end of the show and, essentially, who ultimately wins in the titular game of thrones — so if you don't want to know, turn back now.
The Theory: A Song of Ice and Fire Gives the Ending Away
The title Game of Thrones is the name of the TV series but not George R. R. Martin's book series. The first book is called A Game of Thrones, but the whole book series, comprising the already-published five books (and the two still to come), is called A Song of Ice and Fire. A lovely name, to be sure, but what if it's more than that?
What If Ice and Fire Signify Certain People?
What if this epic "song" is about how two characters — symbolized by ice and fire — come together in the end? The obvious characters are:
Jon Snow = Ice
Jon has been living in the icy cold of the Wall and beyond for six seasons; now he's the King in the North.
Daenerys Targaryen = Fire
There has been tons of fire imagery associated with Daenerys on the show, including her own "rebirth" in the first season in a funeral pyre for Khal Drogo, her dragons breathing fire, and of course, that badass walk through fire in Vaes Dothrak. Also: the Targaryen words are "Fire and Blood."
Therefore, A Song of Ice and Fire = A Song of Jon Snow and Daenerys Targaryen
A stretch? Could be, but consider the two characters who fans have an undying love for and who both seem destined for something more. There's also the fact that Jon's resurrection is not just a major indication of his destiny, but also a distinct parallel to Daenerys's similar immunity to certain death in the same season. Thus, we could be watching the story of how the Seven Kingdoms are destined for two rulers, not just one, and the Iron Throne will be cozily shared by Jon and Daenerys. Also, since Jon is a Targaryen, you might be pointing out that that makes him and Daenerys related (technically, she'd be his aunt), but marrying within the family has always been a Targaryen custom.
And though I suppose other characters could fulfill the ice and fire symbols, it's almost too obvious. And finally, in season seven, Melisandre is the catalyst who brings Jon and Daenerys together, and she calls them "ice and fire," having already said both have a large role to play in Westeros's destiny.
It's undeniable: the end has to be all about these two.