It could be a situation where Naruto was sent on a very dangerous undercover mission. There was a leak in the intel, and the enemy set a trap. Naruto was caught in the trap, and there were reports of a massive battle. When no word came from Naruto for a long time and the area where he was last seen was completely destroyed, Sakura thought he was dead.
Maybe there was a powerful enemy attack. Naruto went to fight alone against a really strong foe, and then there was a huge explosion. After that, no one could find Naruto's body. So Sakura assumed he was dead.
One consequence could be moral. They would have to deal with the ethics of controlling the dead. Are they disturbing the natural order? This could cause a rift between them and some of their friends and allies who might not agree with such a practice.
One possible plot could be that they discover they are siblings later in life. Maybe there was some sort of hidden family secret or a mix - up at birth. Then they would have to deal with the emotional turmoil of this new revelation while still being part of the ninja world. They might also have to face the reactions of their friends like Sasuke, who would have to adjust to this new family dynamic.
In a fanfiction, Sakura and Ino fighting over Naruto could lead to some intense verbal exchanges. Maybe Sakura would bring up how she has been on more missions with Naruto, while Ino might counter with how she has a deeper understanding of Naruto's emotional side. It could also involve some petty rivalries like competing over who gets to sit next to Naruto during team meetings in the fan - made story.
In some fanfiction concepts, Naruto and Sakura might control the dead through powerful jutsu. Maybe they discover an ancient forbidden technique. For example, they could find a scroll that teaches them how to manipulate the souls of the dead. This could be a result of their continuous exploration and growth in the ninja world.
It could be an old enemy of the Hyuga clan. Since Hinata is a part of the Hyuga, someone with a vendetta against the clan might target her.
In this case, Sakura could be seen as the antagonist, at least in that particular moment when Naruto tells her off. Since Naruto is the one doing the telling - off, it's because of something Sakura has done or said that has pushed him to that point.
A fan who really likes Sakura and wants to show her strength. They might be tired of seeing Sakura always in a support role and want to create a scenario where she takes the lead and shows her power by beating up Naruto.
One common theme could be exploring alternative storylines where the absence of Sasuke and Sakura leads to different power dynamics in the Naruto universe. For example, other characters might have to step up and fill the void left by Sasuke's power. Another theme could be a focus on Naruto's reaction and how he copes with the loss of his friends, which could lead to character development in ways not seen in the original series.
Maybe Loki is wrongly accused of a crime in Asgard. The Avengers, having had their own experiences with false accusations, step in to defend him. They believe in justice and know that Loki might not be guilty.
A Quidditch accident could be a start. If Draco were to get seriously injured during a Quidditch match and Harry were the first to help him, Draco might feel gratitude towards Harry. This newfound feeling could break down the walls between them. After that, they might start having conversations in the hospital wing, slowly realizing they have more in common than they thought.