Revelation 6:8 reads: "And I looked, and behold a pale horse: and his name that sat on him was Death, and Hell followed with him. And power was given unto them over the fourth part of the earth, to kill with sword, and with hunger, and with death, and with the beasts of the earth."
We already know from Arya's Faceless Men training and her swift assassination of the Night King that she is a killer. Fans believe that Arya is taking off on the horse with the sole mission of killing. At this point, with Cersei gone, there's only one really dangerous person left in play: Daenerys.
It means Arya comes in peace and may rule the Seven Kingdoms.
There's a new theory that has derived from a different Revelations passage. "Then I saw heaven opened, and behold, a white horse! The one sitting on it is called Faithful and True, and in righteousness, he judges and makes war. His eyes are like a flame of fire, and on his head are many diadems, and he has a name written that no one knows but himself. He is clothed in a robe dipped in[a] blood, and the name by which he is called is The Word of God. And the armies of heaven, arrayed in fine linen, white and pure, were following him on white horses. From his mouth comes a sharp sword with which to strike down the nations, and he will rule them with a rod of iron. He will tread the winepress of the fury of the wrath of God the Almighty. On his robe and on his thigh he has a name written, King of kings and Lord of lords."
In this passage, the person on the white horse is a person pure of heart.
It means Arya herself is dead.
Some Redditors noticed that Arya's horse strongly resembled Golden Company leader Harry Strickland's steed. It's an important distinction because if it's the same horse, fans are pretty sure it died on the show. If the horse is dead, then is Arya riding a ghost horse? And is Arya riding a ghost horse because she too is dead? As one Redditor pointed out, "She got all burnt up and a building fell on her." And why would Game of Thrones make such a big point of showing both disasters?
Guess we'll have to wait and see on this one.
See Game of Thrones star Sophie Turner on marie claire Australia’s June 2019 cover below:
WATCH: 'Game of Thrones' Finale Episode Trailer.