One possibility in this kind of fanfiction is that Naruto is experimented on by some rogue ninja or a new, evil organization. They try to manipulate his chakra in a way that it becomes unstable. Eventually, this instability reaches a breaking point and he explodes. This could then lead to a whole new story arc where his friends try to bring him back or seek revenge for what happened to him.
Well, it could be about Naruto somehow losing control of his chakra in a new and extreme way that causes him to literally explode. Maybe an enemy uses a new type of jutsu that backfires on Naruto's own chakra system.
It could be Orochimaru. He's always been interested in power and experimenting. Maybe he sees Naruto as a perfect guinea pig to test some new jutsu that goes horribly wrong and causes Naruto to explode.
I'm not sure specifically as there could be many different interpretations in such a fanfiction. It might involve Naruto being sent back to his home by a kami (a god or deity in the Naruto universe) perhaps to deal with some unfinished business, or to reunite with his family and friends in a different way than the original story.
Well, in fanfictions like 'naruto and the wolf goddess naruto fanfiction', it could go in many directions. The wolf goddess could have her own motives. For example, she might be from a long - forgotten part of the Naruto universe. She could bring Naruto a special power or knowledge that he needs to face a greater threat. Or perhaps she has some sort of connection to Naruto's past that he is unaware of, and through their interactions, Naruto discovers more about himself and his destiny.
I'm not sure specifically as I haven't read this exact fanfiction. But generally, it might combine elements from Naruto and the Shikon no Tama (Jewel of Four Souls) concepts. It could involve Naruto characters in a story related to the power of the Shikon Jewel, perhaps with Naruto on a quest to obtain or protect it.
One interesting plot idea could be a time - travel story. For example, Naruto is sent back in time to the era of the First Hokage. He could use his knowledge of future jutsu and events to change things for the better in the past. Another idea is a story where Naruto discovers a hidden clan within Konoha that has a unique and powerful Kekkei Genkai. He then has to help this clan gain acceptance in the village. A third idea might be a story where Naruto is turned into a different creature, like a cat or a fox, and has to find a way to turn back while still dealing with the normal threats to the village.
No, it's not common. Naruto is known for his determination and his pursuit of being a great ninja. Smoking is something that doesn't really fit into his character profile. But in fanfiction, writers sometimes like to take a character out of their comfort zone or established image, so there might be a few out there with this plot, but not many.
I have no idea. This kind of topic seems quite unusual and might not be appropriate or mainstream.
Well, without actually reading it in detail, generally in such a fanfiction, Naruto might have some extraordinary adventures related to his control over the bijuu. He could be using their powers in unique ways to fight enemies, or perhaps he's on a journey to master their full potential and face new challenges that come with that power.
The plot could also involve Naruto trying to convince the Raikage to change some of the Cloud Village's more isolationist policies. As Naruto has a vision of unity among all the ninja villages, he sees the Raikage as a key figure to help him achieve this. The Raikage, initially resistant, might gradually come around to Naruto's way of thinking as they spend more time together.
One possible plot could be Naruto ruling over a united ninja world. He would focus on eliminating old rivalries and promoting trade and cultural exchange between the villages.