Well, it could be about Naruto's kids starting their ninja training. Maybe they face a new threat that the older generation didn't fully eradicate. And Naruto is now a more experienced Hokage, guiding the new generation.
Obviously, Naruto himself would still be a main character, as he is now an important figure in the village. His son Boruto could also be a main character, as he might be following in his father's footsteps. And Sasuke would likely still play a significant role, perhaps as a mentor to the new generation.
It could be about the characters' growth and change over eight years. Maybe they've achieved their dreams or faced new challenges. For example, if it's a superhero fanfic, the hero might have new powers or a different approach to fighting crime after 8 years.
It could be the original main characters from the source material, just older and more experienced. For example, if it's a fanfic based on a teen drama, the once - young protagonists are now adults with more responsibilities.
It could be about Calzona reuniting after 4 years apart. Maybe they've both grown and changed, and now they have to rediscover their love for each other.
" 100 Years Later, The Return of the Beast Electric Battle Team, The Dragon Warrior " was a Japanese sci-fi action movie released in 2014. It told the story of the resurrection of the Deokusu Army, who was defeated by the Beast Electric Battle Team in the year 2114. The movie didn't have a high rating on Douban. Only 1.8% of the audience said they wanted to watch it or had already watched it. In addition, there was also a film directed by Robert Rodriguez," 100 Years," which was sealed in a time capsule and would be released in 2115. The plot of the movie showed three different futures for mankind. To sum up, the movies 100 years later were " The Return of the Beast Lightning Battle Team, 100 Years Later " and " 100 Years."
Well, in this 'Harry Potter 19 Years Later Fanfic', it could explore the relationships between the characters more deeply. For example, how Harry and Ginny's marriage has developed over the years and how they are raising their children. It might also show how the wizarding world has changed in those 19 years, like new spells being introduced or changes in the Hogwarts curriculum.
Well, it could be about Naruto's kids facing a new threat that was somehow related to the past. Maybe an old enemy's apprentice has come back to seek revenge for their master's defeat decades ago.
Most likely the children of the main characters from the original series. Like James, Albus, and Lily Potter. Also, the kids of Ron and Hermione, like Rose and Hugo.