It could be that Naruto returns to a world that has changed a great deal in his absence. There could be new political situations in the ninja world. For example, new alliances might have been formed between different villages. Naruto, being Naruto, would probably try to bridge any gaps or misunderstandings. He might also discover new talents among the younger generation of ninjas. He could take on the role of a mentor, just like some of the people who guided him in the past. His return could also spark a new era of peace and cooperation in the ninja world as everyone looks up to him as a symbol of hope and strength.
The main characters would surely include Naruto. Since he's the one returning to his world. His friends from the village, like Shikamaru who is smart and could be involved in strategizing when Naruto comes back. And Hinata, as she has a special relationship with Naruto. Also, villains or antagonists that Naruto has to face or reconcile with could also be important characters in the fanfic.
Perhaps Naruto returns to find his former world in chaos under the rule of a tyrant. Remembering the pain and suffering he endured there, he decides to take revenge by overthrowing the tyrant. He uses his ninja skills and his ability to inspire others to build a resistance.
Well, Naruto might find that his old friends have changed a great deal. Maybe some of them have new powers or have faced different challenges in his absence. He could also discover new threats to the village that he needs to deal with right away.
There's a good chance he meets Kakashi first. Kakashi was his mentor and they have a strong bond. Kakashi might be out on a mission near the place where Naruto returns, or just be around the village doing his usual thing like reading his book at the training ground.
Well, Naruto could face old enemies who thought he was gone for good. They might be shocked when he returns seeking revenge. For example, if Orochimaru was still causing trouble, Naruto would use his newfound knowledge and strength to take him on.
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.
The 'naruto returns to konoha fanfic' might focus on Naruto's relationships. For example, his relationship with Sakura could be explored further. He might come back to Konoha and realize his true feelings for her, or there could be some unresolved issues between them that need to be sorted out. Also, his bond with Kakashi and the other villagers would be re - established in a new light, as he has changed during his time away.
The important characters in 'Naruto Returns to the Village Fanfic' would surely include Naruto. Then there are his closest friends and allies. Hinata could be there, and their relationship might be further explored. The elders of the village could also be important as they might have different reactions to Naruto's return. Some might be welcoming, while others might be skeptical. And the new generation of shinobi, like Boruto's friends if it's set in that time frame, could look up to Naruto and be influenced by his return.