Maybe an old enemy who was thought to be defeated but has somehow returned stronger. Orochimaru could be a possibility. He was always obsessed with power and immortality. If Naruto is revived, Orochimaru might see it as an opportunity to study Naruto's new state of being (since he was revived) and use that knowledge for his own dark purposes.
I haven't actually read this fanfiction yet. But if Naruto is revived in it, there could be so many interesting plot twists. Maybe he comes back with new powers or a different perspective on the ninja world. It might also explore how his return affects his relationships with his friends and the village.
Yes, there are several fanfictions where Minato is revived. In many of these stories, it often changes the course of the Naruto universe significantly. His revival can lead to different interactions with Naruto, and he might use his skills and knowledge to help Naruto in new ways, such as teaching him more about the Uzumaki clan secrets or providing unique combat strategies against new enemies.
One can expect a lot of emotional moments. His friends would be overjoyed to see Naruto back. And Naruto himself would probably be a bit disoriented at first, having to come to terms with being alive again. It could also involve some sort of quest that only Naruto can undertake now that he's revived.
Obviously, Naruto himself is a main character as the story revolves around his revival. His friends like Sasuke, Sakura, and Kakashi are also likely to be main characters. They would be involved in the process of bringing Naruto back or in helping him adjust to his new life after revival.
One possible scenario in such a fanfiction could be that Kushina's revival has a profound impact on Naruto. She could help him understand more about his Uzumaki heritage and perhaps teach him some long - lost Uzumaki jutsus. Her presence might also change the political situation in the Hidden Leaf, as she was an important figure before her death.
An unexpected ally could be an old enemy from his past. Maybe a Hollow that he once fought and defeated now sees a greater threat in the situation after Ichigo's revival and decides to team up with him. For example, the Hollow might have information about the new forces that are emerging since Ichigo's return and offers to share that in exchange for some form of protection or mutual benefit.
One interesting plot could be Naruto coming back with new and enhanced powers. Maybe he has a special connection to a new chakra source that was unknown before his revival. This would make him even more powerful and able to face new threats that emerged during his absence.
A 'Naruto Minato Revived' fanfiction could have a plot where Minato is revived in a time of relative peace. He has to adjust to the new world where his son is a hero. He could start mentoring the younger generation of ninjas in the Leaf Village, sharing his knowledge about sealing techniques and combat strategies. He might also be involved in some political intrigue within the village as some might fear his power or see him as a threat to the new order.
One consequence could be that Naruto has some strange side - effects. Since Orochimaru's methods are often unorthodox, Naruto might have trouble controlling his chakra properly. For example, his chakra could be tainted with some of Orochimaru's dark chakra, making his jutsu less stable.