Well, perhaps in the fanfiction, Harry hears his parents will return as spirits to protect Hogwarts. They could be bound to the castle in a way that only Harry can sense. Or it could be that Harry hears his parents will be able to communicate with him through a magical object like a special mirror. This mirror might show their images and convey their messages. Also, it's possible that Harry hears his parents will have a role in helping him understand a hidden power within himself.
In this 'Harry hears his parents will fanfiction', there could be a situation where Harry hears his parents will be re - created in an alternate dimension. This alternate dimension might be accessible through a secret portal in Hogwarts. The fanfiction could explore how Harry tries to reach this dimension to be reunited with his parents. Another idea is that Harry hears his parents will have left him a series of magical tasks. Completing these tasks will lead to some sort of revelation about his family's past or give him new powers to fight against the dark forces.
Harry would probably be overjoyed at first. After all, he has always longed for his parents. He might start to look for ways to make it happen, like searching for magic spells or ancient artifacts that could bring his parents back.
One possible scenario could be that Harry leaves his parents due to a mysterious prophecy that he needs to fulfill away from them to keep them safe. Another could be that he discovers a hidden power within himself that he can't develop while staying with his parents, so he decides to leave.
One possible reason could be a misunderstanding. Maybe he discovers some secrets about his parents that he misinterprets. For example, if he finds out they were involved in some dangerous or morally ambiguous activities in their youth that he doesn't fully understand at first.
One possible reason could be that he discovers some long - hidden family secrets that make him question his parents' actions or decisions. Maybe he finds out about some dark deeds in their past that he can't overlook.
One possible reason could be that he might feel abandoned. Growing up without them, he could resent the fact that they left him an orphan. He might think that if they were really so great, they would have found a way to survive and be there for him.
One possible plotline could be Harry feeling extremely lost and alone at first. He might have to find a new place to live, perhaps with the help of his friends like Ron and Hermione. He could struggle with self - worth, constantly wondering what he did wrong to make his parents disown him.
One possible consequence could be that Harry becomes withdrawn and distrustful. He might have difficulty forming relationships with others, always fearing that they will also be cruel like his parents. He could also develop low self - esteem, constantly believing that he is unworthy of love and care because of how his parents treated him.
Well, a common storyline could be that Harry, after being abandoned by his parents, is discovered by a powerful but reclusive wizard. This wizard takes Harry under his wing and trains him to be extremely powerful in magic, much more so than in the original story. This could lead to Harry having a different set of friends and enemies. Another idea is that Harry is abandoned near a magical school in another country. He grows up there, learning a different type of magic. When he finally comes to Hogwarts, he has a clash of magical cultures. And yet another could be that Harry is found by a magical organization that experiments on abandoned magical children. He has to escape from there and then find his true identity and place in the wizarding world.
He would be extremely confused. Harry has always thought of his parents as heroes, and suddenly finding out they betrayed him would shatter his world view. He'd question everything he believed in.
One possible reason could be that in the fanfic, the author might twist the story to make it seem like his parents' actions had unforeseen consequences that affected Harry negatively. For example, their fight against Voldemort led to Harry being an orphan and having to bear a great burden from a young age.