Some fanfics play with the concept of time - travel. Harry might go back in time and interact with the Malfoys in a different era. This could change the course of their relationship in the present. For example, he could prevent some of the bad blood between them by influencing events in the past. Or there could be a plotline where the Malfoys are the ones with time - travel abilities and they use it to try and change their family's future, which involves getting on the right side of Harry Potter.
One common plotline is the idea of a friendship developing between Harry and Draco. It could start with a small moment of kindness, like Draco helping Harry when he's in a tough situation at Hogwarts, which then gradually grows into a real friendship. Another is a romantic relationship, although this is more controversial. Some fanfics explore the idea of Harry falling for a Malfoy, perhaps Draco's sister, and having to deal with the family drama that comes with it.
A lot of fanfictions focus on the post - war reconciliation between the two parties. After the defeat of Voldemort, the Malfoys, who were on the wrong side, have to find a way to fit back into the wizarding world. Harry, being the hero, could play a role in helping them. This might involve him advocating for the Malfoys' rights or just being a presence that encourages them to change for the better. There are also plotlines where the Malfoys have some information that Harry needs to complete a mission, and they have to work together to make it happen.
One interesting plotline could be how Harry adjusts to the Malfoy family's pure - blood traditions while still holding onto his own values. For example, he might struggle with the Malfoys' views on Muggle - borns. Another could be his relationship with Draco Malfoy. Instead of being rivals, they could become brothers in a sense, and their dynamic would change completely, leading to new adventures at Hogwarts together.
One possible plotline could be Harry growing up with the Malfoy's pure - blood ideals clashing with his own sense of right and wrong. Another might be his relationship with Draco, which could be a complex mix of rivalry and brotherly - like bond.
One interesting plotline could be Harry learning the pure - blood traditions from the Malfoys in a different way than he expected. He might gain a new perspective on the wizarding world's social hierarchy.
One interesting plotline could be Harry's struggle to adapt to the Malfoy family's pure - blood values while still holding onto his own sense of self. Another might be how he forms unexpected friendships within the Slytherin house. And there could also be a plotline about how his relationship with Draco Malfoy changes from enmity to a more brotherly bond.
In Harry Potter fanfiction, the Malfoys are often portrayed in a more complex and sometimes positive light. Some fanfictions might explore Draco Malfoy's struggle between his family's beliefs and his own emerging sense of right and wrong. He could be shown as having a change of heart, perhaps influenced by his interactions with Harry and his friends. This gives a new dimension to his character that we don't fully see in the original books.
One interesting portrayal is when Draco is made into a reluctant ally of Harry. In some fanfictions, he realizes the error of his ways early on and starts to secretly help Harry and his friends. This is a departure from his antagonistic role in the books.
Perhaps in the fanfic, the Malfoys help Harry because Draco has a change of heart after seeing the true brutality of Voldemort's regime. This could lead to the Malfoys providing Harry with a safe haven when he's on the run, which is a very interesting turn of events as they were once his enemies.
Family bonds can also play a role. If the Malfoys, especially Narcissa, see that Voldemort's actions are endangering Draco, they might turn against the Dark Lord. Their love for their family member can override their loyalty to the Dark side, making them 'good' in the context of the fanfiction.
In fanfiction, their relationship can be complex. Sometimes they might be forced to work together against a common dark threat. For example, in some stories, a new dark wizard arises who is more powerful than Voldemort, and both Harry Potter and the Malfoys have to put aside their differences to stop this new evil. It could also involve a change in Draco Malfoy's character, where he starts to see Harry in a different light and they form an uneasy alliance.
One interesting plotline could be the main character trying to adapt to the Malfoy family's pure - blood ideals while holding onto their own moral compass. Maybe they struggle with the family's views on muggle - borns and have to find a way to reconcile the differences.