Well, it could change the story in many ways. For one, he might be able to avoid disasters. For example, if he foresaw an attack on the village, he could prepare defenses in advance. Also, he could change his own personal relationships. Maybe he would see that a friendship would turn sour in the future and try to fix things early on.
If Naruto can see into the future in fanfiction, it would completely transform the plot. He could predict the moves of his enemies during battles. This would make him nearly unbeatable in combat. He might also use this ability to guide the development of Konoha. He could foresee which policies would lead to prosperity and which would cause problems, and act accordingly.
In such a fanfiction, Naruto's future - seeing ability would be a game - changer. He could see the future of his friends. For instance, if he saw that Sasuke was going to be in great danger in the future, he could take steps to prevent it. This would also have an impact on his training. He could know what skills he would need in the future and focus on developing those skills right away.
Look to Chapter 268 for the clearest answer. It begins with To ensure the company's successful listing, Shen Lan even went so far as..., keeps building through Everyone thought she was doomed to lose, but she managed to turn the..., and lands on Jiang Li has nothing to do with Director Sun!".
A practical answer is Chapter 242, because it turns the idea into a concrete scene. The chapter opens with Just when Jiang Yan called to heaven and earth in vain, he looked up and..., adds pressure through Young Master Jiang, it sounds like someone is at the door, aren't you..., and ends on Just.
The best chapter pointer here is Chapter 227, "There's Something Wrong with This Stepmother". It opens with Your Four Pillars of Destiny is very strong, with wealth, authority, and... and closes on Your three palaces are prosperous, and correspondingly, your marriage....
If you want the clearest chapter reference, go to Chapter 239. Early on, I can't believe it, I thought the live broadcast was over, but here's a...; later, the chapter leans on Now, they have to vote for who transformed the most successfully..
Look to Chapter 247 for the clearest answer. It begins with Facts have proved that arch-enemies often understand each other the best., keeps building through It was barely dawn, and Jiang Yan had already had a meltdown., and lands on Why should he expect food without contributing?] [Support!.
Look to Chapter 232 for the clearest answer. It begins with But soon, she suppressed this strange feeling and slowly began to speak,..., keeps building through I'm the oldest, so I should get this chance!" "Get lost, I'm the youngest..., and lands on The moment he saw the information come through.
If you want the clearest chapter reference, go to Chapter 225. Early on, When Zhao Lang's devastatingly handsome face appeared, all six people...; later, the chapter leans on Damn, boss is so handsome, so powerful!" "Boss, I love you, when are you....
Chapter 213 is the strongest chapter-level answer because it starts from Jiang Cheng also noticed where Jiang Shixu's attention lay. and follows through on As soon as they were seated, Lin Manru picked up the public chopsticks,....
Look to Chapter 216 for the clearest answer. It begins with The production team also took advantage of the situation to start an..., keeps building through The enthusiasm has not dwindled over time., and lands on However, the next second, He Yun, who had hardly ever spoken to him,....
A practical answer is Chapter 261, because it turns the idea into a concrete scene. The chapter opens with The village chief's eyes nearly popped out after he heard the whole story., adds pressure through She probably had an affair with Director Sun long ago, after all, she..., and ends on Is it.