One possible plot twist could be that Naruto's smoke jutsu actually hides a powerful secret technique. For example, instead of just being a simple smoke cover, it could be a way to teleport or to create clones that are undetectable within the smoke. Another twist might be that an enemy figures out a way to turn Naruto's smoke jutsu against him, perhaps by using the smoke to spread a harmful gas or illusion that affects Naruto when he uses the jutsu.
The plot twist could be related to the origin of the smoke jutsu. Maybe it was not originally Naruto's jutsu but was given to him by an enemy in disguise who had an ulterior motive. As the fanfic progresses, Naruto discovers that every time he uses the smoke jutsu, it's slowly draining his chakra in a way that he can't detect at first. This could lead to a situation where Naruto has to find a way to either modify the jutsu or stop using it altogether to save himself, while also dealing with the enemy who tricked him into using it in the first place.
Naruto might become more strategic. Since the smoke jutsu can be used for both offense and defense, he would learn to time it better. For example, he could use it to blind opponents before launching a surprise attack. This would make him seem more calculating rather than just relying on brute force.
In the fanfic, Naruto might destroy the army in a very unique way. Instead of using his typical Rasengan or Shadow Clone Jutsu, he could discover a new power within himself. Maybe he unlocks a special form of Sage Mode that gives him the ability to control the elements in a completely different way, allowing him to take on the army with ease.
A plot twist could be that an old enemy of Naruto targets Ayame to get revenge on him. This forces Naruto to not only protect his new wife but also to re - evaluate his past actions and make amends if possible to prevent further harm to his family.
One possible plot twist could be that Naruto, as a girl, has to infiltrate an all - female organization. He might struggle with the different social dynamics and expectations of being a girl in that context. For example, he could be expected to act more demurely, which would be a big change from his normal boisterous self.
Well, one possible plot twist could be that a seemingly weak candidate actually has some hidden super powerful jutsu. Another could be that the exam is secretly being manipulated by an enemy of the village who wants to steal the secrets of the Jounin training. Maybe there's a traitor among the examiners who is trying to sabotage the whole process.
Maybe Naruto finds out that there are some English magic users who mistake him for a powerful wizard due to his chakra abilities. This misunderstanding could create some really interesting and comical situations, like when they try to enroll him in their magic school and he has to explain his ninja powers.
One possible plot twist could be that Naruto's early graduation leads to him facing much stronger opponents right away. He might not be fully prepared mentally or skill - wise, and this could result in some serious challenges that force him to grow up quickly. For example, he could be sent on a mission with high - ranking ninjas where he has to prove himself.
Well, perhaps a plot twist could be that an old enemy resurfaces but this time they target Hinata to get to Naruto. This forces Naruto to not only protect his new wife but also figure out why this enemy is after her specifically. It could also add a layer of drama if Hinata decides to take matters into her own hands and train secretly to be able to defend herself and Naruto better. Or, there could be a political plot twist where their marriage causes unrest in the ninja world because of Hinata's family status and Naruto's position as a hero, leading to them having to fight against those who oppose their union.
Another plot twist could be that the situation Tsunade is in is actually a trap set by an enemy to lure Naruto in. So, while Naruto is trying to save Tsunade, he has to also deal with the real mastermind behind the whole thing. This would add an extra layer of complexity to the story.
In a 'naruto is in a political marriage fanfic', a plot twist could be that the political marriage was actually a way to unite two long - feuding clans within the village. However, as Naruto delves deeper into the relationship, he realizes that there are deep - seated grudges among the members of the clans that are not so easily overcome. He then has to use his charisma and leadership skills to try and bridge the gap between the two clans, all while dealing with the pressures of a new marriage.