It could be a former member of Akatsuki who has a personal vendetta against Naruto. Maybe they escaped from prison and now they want to take revenge on Naruto for all the things he did to Akatsuki. They would be a very powerful and dangerous antagonist as they possess knowledge of many dark jutsus.
One idea could be that Team 7 has to protect Naruto from a new and powerful enemy who can manipulate time. They must constantly be on guard as this enemy tries to go back in time to kill Naruto when he was a child. Another could be that they protect Naruto from a dark curse that was placed on him by an ancient clan. They search for a way to break the curse while fending off those who want to use the curse for their own evil purposes.
In fanfic, 'Team 7 protects Harry Potter' could mean that a group named Team 7 takes on the role of safeguarding Harry. This might be a new take on the story where an original group, perhaps created by the fanfic author, uses their unique skills and relationships to keep Harry out of danger. Maybe they are a group of students with special abilities or a secret organization within Hogwarts.
It could be. Haku is a beloved character, and protection - themed stories are quite common in fanfiction. So it's likely that there are quite a few Naruto fanfics with this concept.
In a fanfic where Naruto protects Hogwarts, he would bring his unique ninja skills. His shadow clone jutsu could be used for various purposes like scouting the large Hogwarts grounds or confusing the enemies. He could also use his Rasengan to fend off dark wizards. Naruto's determination and never - give - up attitude would inspire the Hogwarts students and teachers, adding a new dynamic to the Hogwarts' defense system.
Well, it could mean that in a Naruto fanfic (fan - made fictional story about Naruto), the character Haku is in a role of protecting someone or something. Haku was a very loyal character in Naruto, so it makes sense in a fan - created scenario for Haku to be a protector.
Well, it's hard to say for sure. The story could go either way. Maybe Will has the motivation and ability to protect Nico, or there could be circumstances preventing it.
It could be some of the younger ninjas from the village who look up to Naruto. Maybe a young genin who has a special ability with earth jutsu, and another who is really good at stealth but lacks confidence. Naruto would then help them grow.
Another interesting one is 'Protecting Sakura: Naruto's Vow'. In this fanfic, Naruto makes a solemn vow to always protect Sakura after she nearly loses her life in a battle against a rogue ninja. He trains extra hard and devises a whole new strategy to ensure her safety at all times.
Another plotline might be that there is a prophecy in the Harry Potter world that only a foreign hero can save Harry. Naruto arrives just in time. He has to learn about the wizarding world quickly while also fending off attacks from the dark side. He could use his shadow clone jutsu to confuse enemies and keep Harry safe.