Well, if Harry ignores the Order, he could potentially put his friends in jeopardy. His actions might draw unwanted attention from the Death Eaters or Voldemort himself. For example, if he goes off on his own to search for Horcruxes without the Order's plan, he might be captured and forced to reveal important information.
In this kind of fanfiction, Harry might face various consequences. He could end up in dangerous situations all alone without the support and guidance of the Order. Maybe he stumbles upon a powerful dark magic artifact while on his own and has to figure out how to deal with it without the proper knowledge from the Order.
In some fanfictions, Harry might initially be angry and feel betrayed when he confronts the Order. He could question their decisions and secrecy. For example, he might be frustrated about not being fully informed regarding the plans against Voldemort.
Maybe he is summoned to receive special training. The Order could have found a new way to enhance his magical abilities, like teaching him some ancient and powerful spells that can be used against the Dark Arts. It would be a great opportunity for Harry to grow stronger.
Well, he might face new and more dangerous challenges. Maybe he'll learn some really powerful magic that the Order has been keeping secret. And he could form closer bonds with the members, like Sirius, which would be really cool.
Well, in many fanfictions, when Harry meets the Original Order, there could be a lot of revelations. He might learn more about his parents' past and their roles in the Order. Maybe he'll discover hidden secrets or spells that were known only to the Order members. It could also lead to new alliances and friendships within the magical community that he hadn't explored before.
One possible reason could be a plot device to create drama. Maybe the author wants to show a rift between them for the sake of a more complex storyline. For example, if there's some misunderstanding or a secret that has come to light which makes Harry act this way.
Dumbledore, even if he's not physically present in the same way, his influence could still be felt. Maybe through memories or pre - arranged instructions. There could be other members of the Order as well, like McGonagall, who would try to stop Harry from ignoring the Order out of a sense of duty and protection.
Well, he might be given a dangerous mission. Maybe he has to infiltrate a Death Eater stronghold or protect a crucial magical artifact.
Well, perhaps in this fanfiction, Harry has been through so much that he decides to isolate himself from everyone. He might be tired of the constant danger and the expectations placed on him. So he shuts out his friends like Ron and Hermione, and just focuses on his own inner journey, maybe to discover some new magic that he believes can only be found in solitude.
In a Snape Order meeting in fanfiction, there could be intense discussions about the fight against Voldemort. Snape might share some crucial information he's gathered from the Death Eaters. Members of the Order could be suspicious of him at first, but as the meeting progresses, they start to see his value in the fight.
Well, it could show some internal conflicts within the Order. Maybe some members disagree on how to protect Harry Potter. Some might think he should be kept in hiding all the time, while others believe he should be more actively involved in the fight. And there could be new characters introduced who claim to have special skills or knowledge relevant to the battle against the Dark Lord.