The unique aspect of 'Naruto Cold Older' fanfiction is that it offers a different take on Naruto's character. Instead of the young, energetic Naruto we know, we see an older, more mature Naruto dealing with new challenges related to the cold, like frozen landscapes and cold - based enemies. It also allows for a fresh exploration of the Naruto universe in a more extreme environment.
One great 'Naruto Cold Older' fanfiction is 'The Frosty Path of Naruto'. It shows an older Naruto dealing with a new, cold - themed enemy that freezes the land. Another is 'Naruto in the Icy Realm' where he has to adapt to a frozen world and find a way to bring back warmth. There's also 'Cold - Hearted Naruto's New Beginnings' which explores Naruto's character when he becomes colder due to past traumas.
Another plotline might be exploring Naruto's past more deeply. Maybe there are secrets about his parents that were never fully revealed in the original. In the fanfiction, he could discover something new about his father's time as Hokage or his mother's Uzumaki heritage that changes his perspective on his own powers and responsibilities.
In fanfiction, an older Naruto may have a more refined sense of leadership. He has seen more, experienced more battles and political situations. So, he might be more diplomatic in his approach compared to his younger self.
The older brother in the fanfiction might be a character with a tragic past. For example, he could have been experimented on by Orochimaru and gained some strange powers as a result. And he returns to the village later to protect Naruto from the threats that are coming towards him.
Older Naruto fanfiction often has a more nostalgic feel. It was written when the Naruto series was still fresh in people's minds, so the authors were really exploring the initial concepts and characters. Many of them focus on filling in the gaps in the original story, like Naruto's early years or what happened between certain arcs. They also tend to be more influenced by the early art style and themes of the anime.
In such fanfictions, the plot might revolve around them teaming up for a mission. Maybe it's a mission that requires Naruto's brute strength and Hanabi's precision and knowledge of the Hyuga techniques. This could lead to them growing closer as they face challenges together. Their interactions during the mission, like Naruto making Hanabi laugh with his silly antics or Hanabi impressing Naruto with her skills, would be interesting to explore.
One common theme is the passing of the torch. Older Naruto is often shown mentoring the younger generation, like how Kakashi mentored him. Another theme is dealing with the scars of past battles, both physical and mental.
It could be that his new 'godlike' power has isolated him. People might be either in awe or afraid of him, and he may feel that he can't be close to others as before. So he acts coldly as a defense mechanism.
In the fanfiction, the older brother could change Naruto's view of his family and his place in the world. Naruto would have a connection to his past that he didn't know before. This could lead him to explore more about the Uzumaki clan and discover hidden powers or knowledge. And it could also affect his relationships with Sasuke and Sakura. For instance, his brother could help him understand Sasuke's pain better, leading to a different dynamic between them.