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.
Well, in this fanfiction, a really interesting plot twist could be that Naruto's family abandoned him because they thought he was the key to a prophecy that would bring destruction. But as Naruto grows up, he actually has the power to change the prophecy for good. Another plot twist could be that the family was forced to abandon Naruto by an enemy who threatened their lives, and Naruto has to find a way to forgive them and also defeat the common enemy.
A plot twist might be that Naruto's family abandonment was part of a prophecy. In the fanfiction, it could be that in order for Naruto to fulfill a certain destiny, he had to be abandoned so that he could grow in a specific way. Also, there could be a plot twist where the person Naruto thought was his enemy all along was actually the one who knew the truth about his family and was trying to guide him back to them in a roundabout way.
One possible plot twist could be that her family has a secret reason for neglecting her. Maybe they're trying to protect her from some greater danger. Another could be that she discovers she has a hidden power that makes her family regret their neglect.
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.
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.
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.
One possible plot twist could be that Charizard was actually trying to protect Ash by leaving. Maybe it discovered a great danger that was coming and thought that by leaving, it could draw the danger away from Ash and his other Pokémon.
Perhaps Naruto starts to question his own identity. Since he was abandoned by his family, he could be on a journey to discover his true heritage and in the process, his dark side grows as he faces many hardships and betrayals. He may then use his new understanding to either wreak havoc or find a way to forgive and move forward.
One common plot twist is that his family actually has a noble reason for abandoning him. Maybe they were trying to protect him from a greater evil that they knew was coming for him. Another is that Harry discovers he has a hidden power that his family was afraid of, which led to the abandonment. For example, he could have a power that is considered dark but is actually something that can be used for good.
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.