For a long time now, there's been a theory that the prophesied "three-headed dragon" -- which Daenerys learned about in the House of the Undying -- will consist of her, Jon Snow, and Tyrion Lannister.

Game of Thrones could have looked very different had George R.R. Martin stuck to his early plans - and, yes, that even includes a love triangle between Jon Snow, Arya Stark, and Tyrion Lannister.