Naruto might also use some of the special items or powers he has acquired in the fanfiction world. Maybe he has a magical amulet that can nullify Kabuto's attacks for a short time. He uses this opportunity to dash towards Tsunade and get her to safety. Then he could use his own natural skills like his agility and reflexes to keep Kabuto at bay until help arrives.
One strategy could be that Naruto uses his speed. Since he has trained a lot, he can move faster than Hidan can react. He quickly dashes in, grabs Asuma, and gets out of Hidan's range before Hidan can even start his ritual. It's a simple yet effective way in the world of fanfiction.
In some fanfictions, Naruto might use his new jutsu that he's developed through intense training. He could overpower Kabuto with his Rasengan variations, like the Big Ball Rasengan, and rescue Tsunade while Kabuto is distracted by the powerful attack.
Well, one possibility is that Naruto might initially be deceived by Kabuto. Since Kabuto is quite cunning. Naruto could be led into situations that are against his normal moral code, but eventually he might realize Kabuto's true intentions and try to turn things around.
Perhaps Kabuto wants to use Naruto as a pawn in his own schemes. He might think that by reviving Naruto, he can control the situation in the shinobi world to his advantage.
One possible reason could be a misunderstanding. Maybe Tsunade received some false information about Naruto that made her think he was a threat to the village, so she took actions that ended up hurting him.
In a Naruto kills Kabuto fanfiction, it would likely have a big impact on Naruto's character development. Naruto is usually about saving and redeeming his enemies. Killing Kabuto would be a departure from his normal values. This could lead to internal conflict within Naruto. He might struggle with guilt or question his own actions. On the other hand, it could also show his growth in a different way, that he's willing to do whatever it takes to protect his friends and the village. And from a plot perspective, it would create a rift between Naruto and those who believe in second chances, like Tsunade.
Naruto could inherit Tsunade's medical ninjutsu skills. This would be a huge addition to his arsenal. He could use it to heal his comrades more effectively during missions. Also, he might inherit her ability to store chakra in his forehead. This would give him an extra boost of power when he needed it most. And perhaps he could also learn some of Tsunade's more precise combat techniques that rely on her strength and accuracy.
If Naruto was adopted by Tsunade in fanfiction, he would probably be exposed to a different set of values. Tsunade is a strong - willed and sometimes reckless woman. Naruto could pick up on her fearless attitude towards battle and also her more practical approach to leadership. Also, their relationship might change the power dynamics in the village a bit, as Naruto would be directly under Tsunade's wing.
In fanfiction, it could be due to a prophecy. Suppose there was a prophecy that Naruto would bring great danger to the village in the future. Tsunade, despite her bond with Naruto, might believe in the prophecy and banish him to prevent the foreseen disaster. Also, it could be related to Naruto's power. If his power was growing too rapidly and becoming uncontrollable, Tsunade might banish him to protect the village from any potential harm his power could cause.
One possible plot could be that Tsunade kidnaps Naruto because she believes an enemy is after him and she wants to keep him safe in a secret location. She might think that by taking him away from the village, she can train him without any distractions or threats.