One way the storylines could blend is through a magical event that transports Harry Potter characters to the DC universe where they meet Martians. Maybe a spell gone wrong by Hermione accidentally opens a portal. The Martians, with their unique abilities like telepathy, could interact with the wizards. For example, J'onn J'onzz could communicate with Dumbledore using his telepathy and they could team up against a common enemy like Voldemort who has somehow made his way into the DC universe as well.
The crossover could start with a young Martian coming to Hogwarts as an exchange student. This would introduce the Martian culture and abilities to the wizarding world. At the same time, DC heroes could be called in to help deal with a threat that is endangering both the wizarding world and the DC universe. The different moral codes and ways of doing things in each world would create interesting conflicts and resolutions. For example, Batman's detective skills could be used to solve a mystery in Hogwarts, while Harry Potter and his friends could use their magic to assist the DC heroes in a battle against a powerful villain.
In a Martian, Harry Potter, and DC crossover, the powers could be combined in interesting ways. The DC heroes' superpowers, like Superman's strength and Flash's speed, could be pitted against the magic of the Harry Potter world. Martians could act as mediators or even be influenced by the magic. For instance, if a Martian is exposed to a powerful spell, it might gain new abilities or have its existing ones enhanced. This would create a whole new dynamic in the crossover story.
Harry Potter and Superman would have an interesting interaction. Superman's super strength and invulnerability might be a source of wonder for Harry, while Superman could be intrigued by the magic Harry wields. Martians, like J'onn J'onzz, could interact with both. J'onn could use his shape - shifting ability to blend in at Hogwarts and learn about magic, and also team up with Superman to face any threats that cross over from the wizarding world.
One way the storylines could blend is through a shared universe concept. For example, the unique powers in 'Tenchi Muyo' could interact with the vampiric elements of 'Vampire Rosario'. Maybe the characters from 'Tenchi Muyo' find themselves in the world of 'Vampire Rosario' and have to deal with the vampire politics and powers there. This could lead to interesting character developments as they adapt to a new and dangerous environment.
In a fanfiction, the storylines could merge around the theme of education. Both Hogwarts and Gakuen Alice are schools that teach magic in different ways. A new teacher could be introduced who has knowledge of both magic systems. This teacher could start a special curriculum that combines the teachings of both schools. The students would then have to learn about each other's magic, and this could lead to all sorts of adventures and challenges as they try to master the new combined knowledge.
The storylines could blend through the use of common themes like the fight against evil. In both Reborn and Harry Potter, there are forces of darkness to be overcome. So, the characters could come together to face a greater threat that combines elements from both universes.
One way they could blend is through the characters' personalities. In Zootopia, Judy Hopps is determined and idealistic. In Ladybug, Marinette is kind-hearted but also has a secret superhero side. Maybe Judy could end up in Paris and team up with Ladybug to solve a mystery that involves both the animal world and the Miraculous world. For example, a villain could be using animal - themed Miraculous to cause chaos in both worlds.
The storylines could be blended by having a shared goal. Suppose there is a threat that endangers both the Naruto world and the Sekirei world. It could be a new, powerful and evil force. Characters from both series would then have to work together to defeat this threat. Along the way, they would learn about each other's worlds, powers, and cultures. For instance, Naruto characters could teach Sekirei about teamwork in the context of a ninja squad, while Sekirei could show Naruto characters their unique way of bonding with their Ashikabi.
The settings could also be merged. Picture Hogwarts with some areas dedicated to mutant training or a mutant school like Xavier's with a section for teaching magic. The characters would interact in interesting ways. The X - Men could be amazed by the magical creatures in Harry Potter, and the wizards could be in awe of the mutant powers. The story could start with a wizard accidentally stumbling into the mutant world or vice versa, and then they have to figure out how to get back while also dealing with the challenges of the new world they're in.
Well, one way the storylines could blend is through the character interactions. In Tokyo Ghoul, the ghouls have a complex society and set of rules. In Rosario Vampire, there are various supernatural beings. If the two universes crossed over, perhaps the ghouls' need for human flesh could be in conflict with the vampires' need for blood in Rosario Vampire. Maybe some characters from each side would form alliances to deal with this new, complex situation.
In the fanfiction, Fenrir could be a part of an ancient prophecy that involves both the Harry Potter world and Loki's domain. Harry Potter, as the chosen one in his world, is destined to face Fenrir. But Loki has his own plans regarding the prophecy. He tries to manipulate the situation so that he can control the outcome. This would create a complex web of power struggles and alliances.
It blends them by using real scientific facts as a base. For example, the harsh environment of Mars like low gravity and lack of breathable air are real facts. Then it adds fictional elements like the astronaut's ability to MacGyver so many things to survive. So, it's a mix of real science and made - up survival scenarios.