If Harry isn't the one with that title, it could open up possibilities like new villains emerging or existing characters having to step up in ways they wouldn't have otherwise. The focus of the story could shift from Harry's destined role to his personal growth and discovery outside of that predefined fate.
If Harry isn't the Boy Who Lived, it might mean a shift in the power dynamics within the wizarding world. Different characters could rise to prominence and the plot could take unexpected turns. Also, Harry's relationships with others might change as his status is different.
It could lead to a whole new twist in the story. Maybe other characters step up and take on the heroic role that was expected of Harry.
If Naruto was Harry's father in the fanfiction, the story's power dynamics would shift. Naruto is used to dealing with threats on a large scale in his own world. He would bring that experience to the fight against Voldemort. Instead of relying solely on the Order of the Phoenix, Naruto might form his own group of allies, including some ninja - like characters he brings from his world. Also, Harry's understanding of loyalty and friendship would be deeper. Naruto values his friends above all else, and he would instill that in Harry from a young age, which could lead to different decisions in the story.
Sometimes, in fanfiction, authors like to challenge the established norms to create unique and unexpected plots. Maybe they thought it would add more depth or drama to have Harry Potter not be the boy who lived in their particular story.
Perhaps it's to showcase Neville's growth and strength that was often overlooked in the original story. This fanfiction idea might aim to highlight that anyone can rise to the occasion and be a hero, not just the obvious choice like Harry.
It is complete. The story wraps up all the major plot points and gives a satisfying conclusion to the alternate take on the Harry Potter universe.
Perhaps it's to challenge the traditional narrative and offer a fresh perspective. Maybe it's to show how Ron could have handled the challenges if he were in Harry's shoes.
It's rare. Usually, the 'boy who lived' is Harry Potter himself in the original story and most fanfictions adhere to this. However, there could be unique takes where his brother takes on that role, but it's not the norm.
Harry's character would be more conflicted. On one hand, he has his natural inclination towards good from his original Potter bloodline. But on the other hand, Zeref's upbringing would expose him to darker elements. So he would constantly be at war within himself about what is right and wrong. For example, he might be tempted to use more aggressive or unethical magic to achieve his goals, yet still have that inner voice telling him it's wrong. Also, he would be more secretive, not sharing his thoughts and plans easily with others, as Zeref is often a rather mysterious character himself.
Well, if Neville was the 'Wrong Boy Who Lived', the entire magical world's perception of heroes and chosen ones would shift. It would also change how his character develops and how he interacts with others.
It could be because some fanfiction writers want to take a different approach and create a new storyline where Harry's role or perception is challenged.