Naruto might meet Itachi in heaven. Itachi could finally reveal all the secrets and the true intentions behind his actions to Naruto. And they could become true friends without any misunderstandings. Additionally, Naruto could also meet Neji, and they would talk about how the ninja world has changed since Neji's sacrifice.
I'm not sure specifically as there could be many different interpretations in fanfics. It might involve Naruto achieving some great power or bringing some kind of enlightenment to the Naruto universe. But without reading it, it's hard to say for sure.
I think it has a decent following. The 'naruto king of heaven fanfiction' often features Naruto with abilities that are far beyond his normal scope in the original series. This can be appealing to fans who want to read about Naruto in a completely new and overpowered light. It also gives writers a chance to create unique and thrilling adventures for this super - powered Naruto.
There's a good chance he would meet Itachi. Itachi had a complex relationship with Naruto and played an important role in the overall story. In heaven, they could clear up any misunderstandings and Itachi could explain his actions more fully to Naruto, and Naruto could perhaps offer his forgiveness and understanding.
It's hard to say without actually reading the fanfic, but it could feature Naruto himself as one of the main characters, perhaps with some new abilities related to 'heaven' and 'earth'.
I'm not sure if it's popular. There are so many Naruto fanfictions out there that it's hard to gauge the popularity of one specific one. It might be popular within a certain group of Naruto fans who are interested in this kind of scenario - based fanfiction.
This fanfiction might center around the idea of Naruto characters being put in the '7 Minutes in Heaven' situation. It could be a fun and creative take on the Naruto universe. It might show how different characters react when they are suddenly thrust into a situation where they have to spend 7 minutes alone with another character. It could also be a way for the author to explore unspoken feelings or potential relationships between characters, but again, this is all speculation without actually reading it.
A fanfiction idea could be that Naruto and Sakura find themselves in a world that is divided into Heaven - like and Earth - like regions. Naruto, with his positive energy, is more attuned to the Heaven part, while Sakura, being more grounded, has a special connection to the Earth part. They must work together to bridge the gap between these two areas and in the process, they realize their hidden feelings for each other.
The 'heaven and hell naruto fanfic' often plays with the idea of morality and redemption. Naruto, being a character with a strong sense of justice, might face moral dilemmas in these extreme environments. He could encounter situations where his normal beliefs are challenged, like in hell, he has to make deals with demons to save his friends. And in heaven, he might have to prove his worthiness in a different way than he does in the normal Naruto world. This exploration of different values and growth makes these fanfics quite interesting.