Another plot twist could be that a powerful jutsu in the Naruto world causes Sheele to forget who she is. Naruto then has to help her regain her memories while also protecting her from those who might want to take advantage of her in this vulnerable state. This would be a great opportunity to explore their relationship on a deeper level.
Perhaps Naruto discovers that Sheele was sent to his world by an enemy as a spy, but she has actually fallen in love with the place and the people, especially Naruto, and she has to prove her loyalty. This would create a lot of drama and tension in the story.
Perhaps Naruto discovers that Kisame has a family he's been protecting in secret, and this new knowledge makes Naruto see Kisame in a different light. He then tries to help Kisame reunite with his family while also dealing with the Akatsuki.
A possible plot twist could be that Tsuyu is secretly related to one of Naruto's enemies. Maybe she discovers this during the course of a mission and has to decide whether to side with her newfound family or continue to be Naruto's ally.
One possible plot twist could be that Naruto was cloned by an enemy to infiltrate the Leaf Village. But as he grows up, he starts to develop his own sense of self and loyalty to the village, causing a conflict within him. Another could be that the real Naruto is actually alive somewhere else, and the clone Naruto has to find and reunite with his original self.
A possible plot twist could be that Naruto discovers he has a hidden connection to Smaug. Maybe he is related to Smaug in some long - lost magical way. Another twist could be that Smaug is not really a villain in this fanfiction. Instead, he is being controlled by a greater evil, and Naruto has to figure out how to free Smaug from this control. It would change the whole dynamic of their relationship from one of enmity to a more complex situation where they could potentially become allies.
A possible plot twist could be that Naruto turns out to be a keyblade wielder in disguise. This would completely change the dynamic as everyone in the Naruto world and Kairi would be shocked. It could also mean that Naruto has a whole different origin and mission related to the world of Kingdom Hearts.
A possible plot twist could be that one of the Autobots is actually being controlled by an old enemy from Naruto's world. This enemy has found a way to hack into the Autobot's system and use it for their own revenge. So, while the Autobots seem to be helping Naruto, in reality, they might be leading him into a trap.
One idea could be a crossover where Naruto's world collides with Sheele's. Maybe Naruto is on a mission and accidentally enters Sheele's realm. He teams up with her to fight a common enemy that threatens both their worlds.
A plot twist might be that Naruto, after being abandoned by his family, finds a new 'family' in unexpected places. For example, he could bond closely with a group of outcasts in the village who understand his pain. Or perhaps, the family's abandonment was part of a larger conspiracy within the ninja world, and Naruto's journey to uncover the truth behind it becomes a major part of the story.
A possible plot twist could be that the god who betrays Naruto is actually being controlled by an even greater, more malevolent force. So Naruto, instead of just fighting the betraying god, has to figure out how to deal with this underlying evil. Another twist could be that the god's betrayal was a test all along, and Naruto discovers this at the last moment when he's about to defeat the god.
A possible plot twist could be that Sasuke's vampire condition was actually a curse placed on him by an old enemy of the Uchiha clan. This would add a whole new layer of mystery and revenge to the story. Another twist could be that Naruto discovers he has some sort of power that can either nullify or enhance Sasuke's vampire abilities. It would put their relationship in a new light as Naruto has to decide what to do with this newfound knowledge.