I'm not sure specifically as it's a deleted fanfiction. It might have been about the chaotic events in the Naruto universe post some major event, perhaps exploring the aftermath of a battle or a major shift in the ninja world. But without access to the actual fic, it's hard to say for sure.
Qing Yuannian's postscript was already finished. In the postscript, the author looked back at the process of writing this set of books and said that it took five years to finally complete it. However, the specific content of the postscript was not provided. Therefore, if you wanted to read the afterword of the celebration, you could search for the afterword of the celebration on the relevant novel reading platform.
The length of the story mode in Naruto Storm 4 varies from player to player. But on average, you can expect to spend around 18 hours to finish it, assuming you engage with the main storyline and some additional content.
Yes. The story mode in Naruto Storm 4 is quite immersive. It follows the plot of the anime/manga closely and adds some extra elements to make the experience even more exciting.
Since it's deleted, you probably can't find it in the usual fanfiction platforms. However, there might be some caches or saved versions on the internet if someone happened to save it before it was deleted. But this is very unlikely and may also be against the terms of use of the original hosting site.
The aftermath could be Minato's quest for revenge if Naruto's death was caused by someone. He would use his skills and knowledge to track down those responsible. Or, he could be plunged into a deep depression. He might isolate himself from the other spirits or entities in the afterlife. His whole existence could become centered around his grief and his memories of Naruto.
Obviously, Naruto and Sasuke are going to be the main characters. Their relationship and how it develops after their fight is likely to be the central focus of the fanfic.
It might show the villagers feeling immediate regret. Once Naruto is dead, they may start to realize their mistake. They remember all the times Naruto actually tried to help them and protect the village, and they are filled with guilt for their hasty and cruel action.