A possible plot twist is that Kakashi's past enemies start targeting Naruto because of their relation. This would put Kakashi in a tough spot, having to protect Naruto while also dealing with his own demons. It could also lead to a whole new arc in the fanfiction where they have to discover the truth about their family to defeat these enemies.
Well, one plot twist could be that Kakashi has been secretly training Naruto all along, using his knowledge of their family connection. Another could be that there's some sort of hidden power or curse in their family that only comes to light when they're revealed as brothers.
Well, one possible plot could be that Naruto grows up with Kakashi's guidance from the start. Since Kakashi is so skilled, he could train Naruto in more advanced techniques earlier. This might make Naruto a stronger ninja faster. Also, they could have a closer bond than in the original story, and Naruto might be more confident knowing he has a brother like Kakashi.
One possible plot twist could be that Naruto actually steals something from Kakashi that he thought was unimportant, but it turns out to be a key to a hidden jutsu or a secret mission. Another could be that Kakashi knew Naruto was going to pickpocket him all along and let it happen as part of a training exercise. Maybe Naruto pickpockets Kakashi, but then realizes he has to return the item quickly because it's something that Kakashi needs to save the village.
One major plot point is the adjustment of their relationship. Naruto might initially be shocked or overjoyed to find out Kakashi is his brother. Then they have to figure out how to act around each other. Another plot point could be the impact on their respective goals. Naruto's goal of becoming Hokage might be influenced by having Kakashi as his brother, and Kakashi's role in the village and his own personal missions could also change due to this new family connection.
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.
A plot twist could be that Naruto, being Kushina's brother, has a different mentor. Instead of Jiraiya, he could be trained by an older Uzumaki clan member who has unique abilities. This would shape his fighting style and ninja skills in a whole new way. Also, his relationships with his peers would be different. For example, Sasuke might see him as more of a threat since he has a stronger connection to the Uzumaki clan, which was known for its powerful ninjas. This could lead to more intense rivalries and battles between them.
One possible plot twist could be that Kakashi discovers Naruto has a hidden power that no one else is aware of. This could change the whole dynamic of their relationship. Maybe it's a new type of chakra that only Kakashi can help him control.
One possible plot twist could be that Naruto's love for Kakashi from the past disrupts the timeline. Maybe his feelings cause him to unknowingly change events that were supposed to happen. For example, he might prevent Kakashi from making a certain decision that was crucial in the original timeline.
One possible plot twist could be that they face opposition from the Hidden Leaf Village. Since same - sex relationships might not be as openly accepted in the traditional ninja world. Another twist could be that they have to go on a dangerous mission together right after getting married, which tests their new relationship. And perhaps there's a secret enemy who wants to break them apart because their union represents a new kind of hope in the village.