The plot might start with Draco having some strange dreams about a connection to Harry. He initially dismisses it as just a dream, but as time goes on, he can't ignore it. Meanwhile, Harry is also having some unexplained feelings towards Draco. Eventually, they come across an old wizard who knew their parents well. The wizard reveals that they are brothers. This revelation shakes the wizarding world as they are from two very different 'sides'. They then have to work together to bring about a new era of peace in the wizarding community, uniting the Gryffindors and Slytherins in a way that has never been done before.
One possible plot could be that Harry has always felt a strange connection to Draco. As the story unfolds, they start to notice similarities in their magic that are not common. After some investigation, they find out they are brothers. This then leads to a whole new dynamic where they have to protect each other from the dark forces in the wizarding world. They might also have to face the reactions of their respective families, like Harry's friends at Hogwarts and Draco's family in Slytherin.
Obviously, Harry and Draco are the main characters. Since the story is about them being brothers, they are the focus. But other characters like Hermione and Ron from Harry's side, and Lucius and Narcissa from Draco's side could also play important roles in how they react to this new relationship.
Maybe the twin brother has a special power that Draco doesn't. For example, he could be a seer like Trelawney but more accurate. His visions could show him the future of Hogwarts and the wizarding world during the dark times of Voldemort's return. He then tries to use this power to prevent bad things from happening, but Draco is suspicious of his actions and tries to stop him, thinking he's going against their family and the Dark Lord.
One possible plot could be that Harry would grow up in a very different environment. He might be influenced by the Malfoy family's pure - blood supremacist views at first. But then, as he discovers his own values, he could face a huge internal conflict. He may also have a different relationship with the other Hogwarts students. For example, he might not be as close to Ron and Hermione as in the original story because of his family ties to Draco.
The plot might involve the brother's transformation into a Phoenix - like form in the fanfiction. This could be a result of some magical event or a hidden heritage. As a Phoenix, he would have to deal with the new responsibilities and powers. He could face challenges from other supernatural beings who either fear or envy his new form, all while trying to keep his sister safe and uphold the values of the Lost Girl world.
In the 'Harry and Draco in Prison' fanfiction, it could be that the wizarding world has a new, strict regime. Harry, being the symbol of the resistance against dark forces, is imprisoned to silence him. Draco, who has always been on the fence between good and bad, is also thrown in prison for not fully conforming. Inside, they initially clash due to their long - standing rivalry. However, as time passes, they realize that the real enemy is the unjust system that put them there. They combine their skills, Harry's courage and Draco's cunning, to start a prison - wide revolt and try to bring about change in the wizarding world.
One possible plot could be that Harry discovers this long - lost family connection after some mysterious event. Maybe he finds a hidden letter or an old family heirloom that reveals the truth. This discovery could throw him into an identity crisis as he has to come to terms with being related to a Death Eater. He might then try to find out more about his family's past and his connection to Bellatrix, which could lead him into dangerous situations as he delves deeper into the dark secrets of his family.
One possible plot could be that Harry discovers his true identity as Superman's brother. He might have been separated from Superman at birth for some reason, like a threat to their family. Then, as he grows up in the wizarding world, he starts to show some superhuman abilities which he doesn't understand at first. Eventually, through a series of events, he meets Superman and they realize their connection. Together, they use their combined powers of magic and super - strength to fight a common enemy that threatens both the wizarding world and Metropolis.
One possible plot could be that Harry discovers his long - lost brother Carlisle. This could lead to a journey where Harry has to adapt to the vampire world that Carlisle is part of, while also bringing his own magic into it. Maybe they team up to fight against a common enemy.
In this fanfiction, the plot might be that their brotherhood is a key to uniting two different factions. Harry could represent one side and Uryu the other. Their bond as brothers becomes a symbol of hope for the two groups to come together and cooperate. Along the way, they face internal and external challenges, like people who oppose their union and those who want to use their relationship for their own gain. There could also be a sub - plot about them learning about each other's cultures and abilities, which helps them grow as individuals and as brothers.
Well, it could be that Draco is initially shocked and maybe a bit remorseful when he sees Harry's scars. He might start to see Harry in a new light, realizing the hardships Harry has faced. This could lead to a change in their relationship, perhaps from enemies to something more complex like reluctant allies or even friends.