In this fanfiction scenario, their marriage might bring about some interesting cultural clashes. Harry is used to the wizarding culture with its own set of traditions like using wands, attending Hogwarts, and brewing potions. Natasha, on the other hand, is from a world of high - tech and espionage. But this difference could also be a source of attraction. They could learn from each other and create a unique family culture. For example, their children might be trained in both magic and combat skills, making them super - powerful hybrids in a way.
The storyline could start with a strange magical accident that creates a portal between the Harry Potter universe and the Marvel universe where Black Widow exists. Harry stumbles through this portal and meets Natasha. At first, they are suspicious of each other but soon realize they have a common goal of fighting evil. As they work together, they develop feelings for each other and eventually decide to get married.
It could be Sirius Black's younger sister who was not mentioned in the original series but is created for the fanfiction. She might have similar rebellious traits as Sirius but also her own unique charm that attracts Harry.
Well, perhaps it could involve Harry Potter breaking away from the traditional wizarding world norms. Maybe he meets a Black family member who is a strong and independent witch. They could bond over their shared experiences of dealing with the dark side in different ways. Their relationship might start with mutual respect and admiration, which then blossoms into love.
Well, one way it could work is if there's some sort of magical - technological crossover. Maybe a spell gone wrong transports Harry Potter to the DC universe. And he somehow falls for a DC villain who has a complex backstory and hidden good side. For example, if it was Catwoman, she's a thief but also has a sense of justice at times. Harry, with his experience in seeing the good in people, might be able to bring out more of her positive traits and they could form an unlikely bond.
One possible plot could be that Harry Potter, as the son of Black Widow, discovers his mother's secret past in the wizarding world. He might inherit some of her unique skills, like her combat abilities, and use them to face new threats in Hogwarts. Maybe he forms a special group of friends who are intrigued by his strange heritage and they all embark on adventures together.
A plot could involve time - travel. Harry, for some reason, is sent back in time and meets a younger Narcissa. He gets to know her before she becomes involved with the Dark Arts. They form a bond, and as Harry tries to change the future to prevent some of the tragedies in the wizarding world, their relationship deepens. Eventually, they marry in this altered timeline, and Harry has to deal with the consequences of changing the past and his new relationship with Narcissa.
If Spiderman were the son of Black Widow, it would change a lot of the existing storylines. For starters, his upbringing would be different. Instead of being raised by Aunt May, he might have been trained in combat and espionage from a young age. His moral compass could also be a blend of Spider - Man's typical 'with great power comes great responsibility' and Black Widow's more complex view of right and wrong in the world of spies. And his relationships with other superheroes would be affected too, as he would have this unique connection to Black Widow.
Voldemort could still be a main antagonist. His dark magic and thirst for power would put him at odds with Harry, especially if he sees Harry's connection to Black Widow as a threat. Another could be some of the more traditionalist wizards who don't trust Harry because of his strange heritage.
One possible plotline could be that Bellatrix is somehow brainwashed or redeemed early on. Harry, seeing the potential for good in her, tries to help her further. Over time, they develop feelings for each other and end up getting married. Another could be a time - travel scenario where Harry goes back in time and changes Bellatrix's path before she becomes a full - fledged Death Eater, leading to their relationship and marriage.
One possibility could be that Harry discovers he has some sort of connection to the Black Widow. Maybe he inherits some special skills or abilities from her in a magical way. For example, her combat skills could be translated into some unique form of magic for Harry. He could use these newfound powers to fight against Voldemort and his Death Eaters in a more effective way.