What if Bran wins?

A Dance with Dragons - Bran III

"You saw what you wished to see. Your heart yearns for your father and your home, so that is what you saw."
"A man must know how to look before he can hope to see," said Lord Brynden. "Those were shadows of days past that you saw, Bran. You were looking through the eyes of the heart tree in your godswood. Time is different for a tree than for a man. Sun and soil and water, these are the things a weirwood understands, not days and years and centuries. For men, time is a river. We are trapped in its flow, hurtling from past to present, always in the same direction. The lives of trees are different. They root and grow and die in one place, and that river does not move them. The oak is the acorn, the acorn is the oak. And the weirwood … a thousand human years are a moment to a weirwood, and through such gates you and I may gaze into the past."

A Dance with Dragons - Bran III

Old Nan had told him the same story once, Bran remembered, but when he asked Robb if it was true, his brother laughed and asked him if he believed in grumkins too. He wished Robb were with them now. I'd tell him I could fly, but he wouldn't believe, so I'd have to show him. I bet that he could learn to fly too, him and Arya and Sansa, even baby Rickon and Jon Snow. We could all be ravens and live in Maester Luwin's rookery.

A Clash of Kings - Jon VII

It seemed to sprout from solid rock, its pale roots twisting up from a myriad of fissures and hairline cracks. The tree was slender compared to other weirwoods he had seen, no more than a sapling, yet it was growing as he watched, its limbs thickening as they reached for the sky. Wary, he circled the smooth white trunk until he came to the face. Red eyes looked at him. Fierce eyes they were, yet glad to see him. The weirwood had his brother's face. Had his brother always had three eyes?

Not always, came the silent shout. Not before the crow.

He sniffed at the bark, smelled wolf and tree and boy, but behind that there were other scents, the rich brown smell of warm earth and the hard grey smell of stone and something else, something terrible. Death, he knew. He was smelling death. He cringed back, his hair bristling, and bared his fangs.

Don't be afraid, I like it in the dark. No one can see you, but you can see them. But first you have to open your eyes. See? Like this. And the tree reached down and touched him.

A vast blue-white wall plugged one end of the vale, squeezing between the mountains as if it had shouldered them aside, and for a moment he thought he had dreamed himself back to Castle Black. Then he realized he was looking at a river of ice several thousand feet high. Under that glittering cold cliff was a great lake, its deep cobalt waters reflecting the snowcapped peaks that ringed it. There were men down in the valley, he saw now; many men, thousands, a huge host. Some were tearing great holes in the half-frozen ground, while others trained for war. He watched as a swarming mass of riders charged a shield wall, astride horses no larger than ants. The sound of their mock battle was a rustling of steel leaves, drifting faintly on the wind. Their encampment had no plan to it; he saw no ditches, no sharpened stakes, no neat rows of horse lines. Everywhere crude earthen shelters and hide tents sprouted haphazardly, like a pox on the face of the earth. He spied untidy mounds of hay, smelled goats and sheep, horses and pigs, dogs in great profusion. Tendrils of dark smoke rose from a thousand cookfires.