Well, it could start with a magical portal opening up between the Overwatch world and the wizarding world. Lena might be on a mission when she accidentally stumbles through it and finds herself in Hogwarts. The students and teachers are both intrigued and cautious about this strange new arrival who has such different powers.
It could also be that a dark wizard in the Harry Potter world discovers the existence of the Overwatch world and tries to use Lena's powers for his own evil purposes. He casts a spell to bring her to him. But Lena, being a strong - willed hero, resists and teams up with Harry Potter and his friends to stop the dark wizard's plans, thus causing the two worlds to interact in a complex web of magic, technology, and heroism.
Maybe a powerful spell gone wrong in the wizarding world somehow reaches out and pulls Lena into their realm. Once there, she has to quickly adapt to the strange new rules of magic. Harry Potter, being the curious and brave character he is, would be one of the first to approach her and try to figure out how to send her back or if she can help them in some way, like against a new threat that has emerged due to the strange magical event that brought her there.
A powerful dark magic could be spreading across both worlds. This forces the heroes of both the Harry Potter universe and Queen Tyr'ahnee's kingdom to come together. They would need to combine their magical powers and knowledge to fight this common enemy. In the process, they would learn about each other's worlds and find ways to work together despite their differences.
Well, in a fanfiction scenario, Harry Potter's magical world and Bucky Barnes' superhero world could collide in many ways. Maybe the magic of Harry Potter could be used to heal Bucky's mental and physical scars. For example, a spell like 'Episkey' might be used to fix some of his physical wounds. And Bucky could introduce Harry to the concept of modern technology and warfare, which would be completely new to Harry.
Well, one way their worlds could collide is through a magical accident. Maybe a spell gone wrong in the wizarding world transports Harry Potter to the world where Pepper Potts exists. Harry, being used to magic, would initially be confused by the high - tech world Pepper is in. And Pepper, being a smart and capable person, would be both intrigued and cautious about this strange boy with magical powers.
Another plot could involve Lena being mistaken for a new kind of magical being. Harry and his friends have to figure out who she really is while also dealing with their own magical problems. Along the way, Lena discovers she has some latent magical abilities herself, which she combines with her existing skills to aid the wizarding community.
One way their worlds could collide is through a magical portal. Maybe in a fanfiction, a powerful wizard in the Harry Potter universe accidentally creates a portal that leads to Middle - earth where Aragorn is. And Aragorn, being a brave and curious leader, steps through the portal to explore the strange new world of magic and wizards.
In a fanfiction scenario, perhaps Nick Fury is on a mission to recruit magical beings for S.H.I.E.L.D. He discovers the existence of the Harry Potter world and tries to make contact. Harry and his friends could be initially suspicious but then see the potential in working with Fury. They could exchange knowledge, with the wizards learning about Muggle technology and Fury learning about magic. This could lead to some really interesting team - ups and adventures against common enemies.
Well, it could start with a magical portal opening up in She - Hulk's world and sucking her into the Harry Potter universe. There, she might be seen as a strange and powerful being. The wizards would be both curious and a bit afraid of her. She - Hulk could then team up with Harry and his friends to face a common enemy, like a dark wizard who is trying to use her power for evil purposes.
Well, in Overlord and Harry Potter fanfiction, the magical worlds can collide in various ways. One way could be through a magical portal or spell gone wrong. For example, a character from Overlord might accidentally end up in the wizarding world of Harry Potter. This would lead to all sorts of interesting scenarios. The powerful magic from Overlord might be seen as a threat or a new form of magic to study in the Harry Potter universe. And the different cultures and power hierarchies would surely clash and create a lot of drama.
One way could be through a magical portal. Imagine Harry, while exploring some ancient magic in Hogwarts, accidentally opens a portal that leads to Gaara's world. Gaara, with his sand powers, would be intrigued by Harry's magic. They could start off as cautious of each other but gradually learn from one another. Harry could teach Gaara about spells and magic theory, while Gaara could show Harry how to control and use sand in unique ways.
If we consider their worlds colliding, Gotham's dark and gritty streets would be a strange place for Aphrodite. Batman's world is full of crime and despair, while Aphrodite is from a world of beauty and love. But perhaps Aphrodite would be drawn to Gotham to try and spread her love and change things. Batman would initially be skeptical but might come to see the value in her approach as she starts to have an impact on the villains and the overall mood of the city.