If Dudley had a child who showed signs of magic. This would be really interesting as Dudley would have to turn to Harry for help. Harry would be in a position to guide Dudley and his family through this new and strange situation. It would also show how far Dudley has come from his bullying days as a child.
When Dudley becomes a part of a group that is working against some dark force in the Muggle world and Harry's wizarding skills are needed to help them. This would bring them together in a fight for a common good. They would have to rely on each other's strengths, and it would be a great way to show their growth and development since their last meeting.
A scenario where Dudley has somehow gotten involved with the wizarding world on his own. Maybe he found a magical artifact and was trying to figure out what to do with it when Harry shows up. This would force them to interact in a completely new way, with Dudley now being in Harry's territory so to speak.
Their relationship could evolve positively. Dudley could have grown out of his mean - spirited ways and become more empathetic. He might be in awe of Harry's wizarding abilities now. Harry, seeing Dudley's change, would be more open to him. They could start to support each other, like Dudley helping Harry with Muggle - related things and Harry protecting Dudley from any magical threats.
They might finally make peace. In many fanfictions, Dudley has grown and realized how wrongly he treated Harry in the past. So when they meet again, they could start to have a normal conversation, maybe even become friends or at least be civil to each other.
They might finally have a real heart - to - heart conversation. Dudley could apologize for all the bullying in the past. Harry, being the forgiving person he is, would accept it. Maybe they'd end up becoming friends and sharing stories about their different lives since they parted ways.
One interesting scenario could be Harry Potter using time - turner magic to prevent a major threat to the Starks before it even occurs. He could go back in time and change certain events that would lead to the Starks' endangerment.
In this fanfiction, perhaps Dudley's envy of Harry's magical world finally boiled over into uncontrollable rage. He might have found a way to cross into the wizarding world without anyone knowing. And in a moment of extreme jealousy and anger, Dudley could have used some kind of weapon or spell (maybe through some dark magic loophole) against Harry, which unfortunately led to Harry's death. Fanfiction allows for these extreme and unexpected plot twists.
The main thing that makes 'Harry and Dudley fanfiction' interesting is the transformation of their relationship. In the original books, they start off as enemies. Fanfiction allows for different scenarios where they could become friends or at least understand each other better. It's like seeing two characters who were on opposite sides come together in new and unexpected ways.
Well, it's interesting because it can be a study in contrasts. Harry, the hero with his magical powers and kind heart, and Dudley, the spoiled and often mean - spirited Muggle. When put together in fanfiction, it creates a unique dynamic. Writers can play with their differences and similarities, explore how their upbringings affected them differently, and then build a relationship that might not seem possible at first glance. This exploration of unexpected relationships is what makes 'Harry x Dudley fanfiction' so appealing.
In a fanfiction scenario, they could meet in Sirius's old family home at Grimmauld Place. Harry and Ginny might be exploring the place when Sirius appears. Sirius would greet them with his characteristic charm and warmth. He'd probably offer them a drink and then start a conversation about the current state of the wizarding world, asking Harry about his progress at Hogwarts and Ginny about her experiences in the Gryffindor house.
In fanfiction, it could be that Harry Potter teams up with the Avengers. He brings his magical knowledge and skills, while the Avengers contribute their combat and strategic abilities. Together, they figure out a way to separate Thanos from the Infinity Stones. Once Thanos is no longer in control of the stones, he can't perform the snap. Harry could use spells like 'Expelliarmus' on a grand scale to disarm Thanos of the stones.
In some fanfictions, Dudley could be the main character in an alternate universe. For example, what if Dudley was the one who received the Hogwarts letter instead of Harry? This would completely change the dynamics of the story, with Dudley having to navigate the wizarding world with his own set of values and prejudices.