A 'narusaku naruto returns fanfic' could be about many things. It might focus on Naruto's return in a scenario where he has a relationship with Sakura. It could involve adventures they go on together, how their relationship has developed during his time away and his return, and how they face new challenges in the ninja world as a couple.
Well, it depends on the specific fanfic. Some fanfics might really emphasize Naruto's growth to be on par with Minato in terms of smarts. They could show Naruto learning from Minato's memories or having some sort of spiritual connection that transfers knowledge. However, other fanfics might focus more on other aspects of Naruto's character and not necessarily make him as smart as Minato.
It could be a rogue ninja who was secretly plotting against Naruto all along. After Naruto's death, this antagonist could emerge and try to take over the village, seeing it as the perfect opportunity with the village in mourning and a bit disorganized. This ninja might have some personal vendetta against Naruto and now wants to make the village pay.
You can find 'Naruto Shippuden Narusaku fanfic' on some popular fanfic websites like Fanfiction.net. There are a large number of Naruto - related fanfics on this site, and you can easily search for Narusaku ones. Another option is Archive of Our Own (AO3). It has a great collection of fanfics, and you can filter your search specifically for Narusaku fanfics within the Naruto Shippuden category.
Perhaps in the 'naruto dies narusaku fanfic', Naruto sacrifices himself to save Sakura from a powerful enemy. Sakura, in her despair, starts to discover new aspects of Naruto she never fully realized when he was alive. She could then start a journey to find a way to bring him back, encountering many challenges along the way and meeting old friends and foes who either help or hinder her.
One great 'Naruto Shippuden Narusaku fanfic' is 'A New Beginning'. It explores their relationship post - Shippuden in a very interesting way. The author delves deep into how Sakura and Naruto's feelings for each other develop further. Another one is 'Narusaku: The Unspoken Bond'. It shows their unspoken connection and how they support each other through different challenges.
Well, in some 'Naruto banished Narusaku fanfic', the story takes a dark turn. Naruto is banished unjustly, and Sakura has to fight against the village's decision. These fanfics often play with the idea of loyalty, friendship, and love. They can be really engaging as they rewrite the traditional Naruto storyline in a more complex and challenging way.
In many Narusaku fanfics, Naruto might bring Sasuke back through the power of their friendship. Naruto's unwavering belief in Sasuke could be a key factor. He may constantly remind Sasuke of their past together, the bonds they formed as teammates in Team 7. For example, Naruto could recall the times they trained together, their shared dreams, and how they protected each other in battles. This could slowly chip away at Sasuke's resolve to stay away and eventually lead him to come back.
You can try looking on fanfic websites such as FanFiction.net or Archive of Our Own (AO3). These platforms have a large collection of fanfictions, and there's a good chance you'll find 'narusaku naruto returns fanfic' there.
One possible plot could be that Naruto leaves Konoha due to some misunderstanding. Maybe he feels unappreciated in his relationship with Sakura (Narusaku). He might go on a journey to find himself. Along the way, he could encounter new enemies and also make new friends who help him see things from a different perspective.