In the fanfiction, if Ned Stark sees the future, he might foresee the coming of the White Walkers much earlier. He could start a massive campaign to unite all the kingdoms against the threat. This would involve traveling to different kingdoms, convincing lords and ladies who might be skeptical. He would have to face a lot of opposition at first, but his knowledge of the future could give him the edge to slowly build an alliance. This would be a huge change from the original story where the kingdoms were unprepared for the White Walkers.
One possible plot twist could be that Will is not really who he seems. Maybe he's been influenced by an alien force in a way that makes him seem like the perfect guy for Simmons at first, but then his true motives start to show. This would throw Fitz into a situation where he has to save Simmons not just from heartbreak, but from a real danger.
If Ned Stark sees the future, he might become more distant from Robert Baratheon. Knowing what's to come, he could see Robert's actions as leading to disaster. So he might start to oppose Robert more openly, which would strain their friendship.
Perhaps the plot could involve the two coming together to fight a common enemy. The Targaryen might bring her dragons (assuming this is in a universe where dragons exist in this fanfiction) and Ned Stark could bring his military might and the loyalty of the North. Their marriage could be a strategic alliance that was initially arranged for political reasons but then they grow to love each other. They would then have to navigate the power struggles in Westeros, with many houses vying for control.
The plot could center around the cultural clash between the two families. The Lannisters are known for their cunning and wealth, while the Starks are more about honor and loyalty. So, when a Lannister marries Ned Stark, there would be a lot of adjustments. The Lannister in the marriage might try to bring in their lavish lifestyle, which could be resisted by Ned Stark at first. But over time, they could learn from each other. The Lannister could become more honorable, and Ned Stark could understand the importance of some political maneuvering.
Well, perhaps Harry Potter uses his magic skills like the Patronus charm to fend off the enemies who are about to harm Ned Stark. He could apparate Ned to a safe place just in time.
It could be a future version of himself that has become corrupted by power. He sees this future self causing chaos and destruction, and has to find a way to stop his own dark path. Maybe it's a result of his technology getting out of control and warping his mind.
The man Sakura is with could be an undercover enemy. He might be using Sakura to get to Sasuke. Sakura is unaware of this and Sasuke, seeing them together, starts to suspect something fishy. He then has to figure out how to protect Sakura without revealing his true feelings for her.
Well, it could be that James Potter sees the future and tries to prevent a great tragedy from befalling the wizarding world. Maybe he sees Voldemort rising to power earlier than expected and he has to figure out a way to stop it without changing too much of the future.
Well, one possibility could be that Naruto has some sort of visionary ability where he can see snippets of the future during his past adventures. For example, he might see the final battle against Kaguya while he's still on a mission with his team as a genin. This could change his approach to training and how he interacts with his friends, as he tries to prepare them for what's to come.
It could be about Baby Sakura having visions of different possible futures. Maybe she sees a future where she becomes a great hero and saves her world from a terrible danger. Or perhaps she sees a future with new friends and exciting adventures.