The next morning she woke stiff and sore and aching, with ants crawling on her arms and legs and face. When she realized what they were, she kicked aside the stalks of dry brown grass that had served as her bed and blanket and struggled to her feet. She had bites all over her, little red bumps, itchy and inflamed. Where did all the ants come from? Dany brushed them from her arms and legs and belly. She ran a hand across her stubbly scalp where her hair had burned away, and felt more ants on her head, and one crawling down the back of her neck. She knocked them off and crushed them under her bare feet. There were so many …
It turned out that their anthill was on the other side of her wall. She wondered how the ants had managed to climb over it and find her. To them these tumbledown stones must loom as huge as the Wall of Westeros. The biggest wall in all the world, her brother Viserys used to say, as proud as if he’d built it himself.
This passage clearly shows that Dany will turn her back to the Wall and sleep through the night until the Others/wights coming from the other side of the Wall bite her ass.
It is not a dream. A real event with a symbolic interpretation. GRRM specifically mentioned the Wall and the anthill on the other side of the Wall where the ants were coming to this side and biting humans. There is no nother explanation.
Dany is not AAR. She does not have any investment in the war against the Others. It has been 5 books already and she does not know anything about them. She will be occupied with the Second Dance.
In short, it is not happening.
Oh, before Dany fans swarm the thread and bring the only thing they can use to “prove” that Dany will fight the Others, let me give that myself.
That night she dreamt that she was Rhaegar, riding to the Trident. But she was mounted on a dragon, not a horse. When she saw the Usurper’s rebel host across the river they were armored all in ice, but she bathed them in dragonfire and they melted away like dew and turned the Trident into a torrent.
This is the ONLY piece of “evidence” that can be brought up when arguing that Dany will fight the Others. And it is only when you take this dream at face value. Dreams and prophecies are seldom literal and they might have multiple interpretations. Though Dany fans love to take everything at face value because Dany fulfilled everything about the AAR prophecy at face value.
“The men of the winterlands are made of iron and ice, and even my boldest knights fear to face them.”
A very plausible explanation of Dany’s dream is that Usurper’s host armored in ice is Stannis with the Northmen (described metaphorically as made of ice) following him.
In addition, “melting away” before the dragons is exactly what the Dornish did to defeat Rhaenys. I really don’t see why this dream represents a victory instead of defeat. In the real setting of the dream, Rhaegar was killed by the Usurper.
Another important aspect of this dream is that it is not necessarily a normal prophetic dragon dream. Quaithe is using a glass candle and it is possible to send visions to a person by using glass candles. Dany woke up from this dream in the middle of the night and Quaithe appeared immediately after and told her this:
“Remember. To go north, you must journey south. To reach the west, you must go east. To go forward you must go back, and to touch the light you must pass beneath the shadow.”
If anything, that dream should be related to what Quaithe said afterwards. Rhaegar rode North to the Trident to his death. Quaithe started by warning Dany not to do the same.