A believable crossover can be achieved by having a common goal for both the anime characters and the Avengers. Maybe there is a new, greater threat that emerges as a result of the Endgame events that can only be defeated by the combined forces of both groups. The cultural differences between the two can also be used to add depth. For example, the Avengers might be confused by some of the anime characters' more outlandish behaviors, but they learn to understand and respect them as they work towards the common goal. This kind of interaction and mutual understanding can make the crossover seem more natural and believable.
One way is through the concept of multiverse. In the larger Marvel multiverse, there could be a realm that is anime - like. When the events of Endgame start to disrupt the fabric of the multiverse, it causes a connection between the Avengers' world and this anime realm. The characters' reactions should also be believable. They should be initially confused but then quickly adapt to the new situation, just like how real people would in a strange new environment. Also, the power levels need to be balanced. If an anime character is too overpowered, find a way to limit their abilities in the context of the Endgame story.
To make the crossover believable, focus on the similarities between the two universes. Both the anime world and the Avengers' universe have characters with extraordinary powers. You can start by establishing a connection like a rift in space - time that pulls the characters from one world to the other. Then, make sure the characters' personalities are consistent. For instance, if an anime character is known for being honorable, they should act that way in the Endgame setting as well.
To create a believable character for 'Avengers Endgame' OC fanfiction, first, give them a clear backstory. For example, if they have powers, explain how they got them. Were they born with it, or was it the result of an experiment? Second, give them flaws. A character without flaws is not believable. Maybe they're too impulsive or have a fear that holds them back. Third, give them relationships. They could be friends with some of the minor characters in the 'Avengers' universe. This will help them fit into the world of 'Endgame'.
A believable crossover fanfiction depends on good world-building. Blend the elements of the different universes seamlessly and give proper explanations for any differences. Also, make the interactions between characters feel natural and true to their original traits.
Making a believable crossover starts with understanding the essence of both Marvel and Creepypasta. Marvel has its heroes with their distinct powers and moral compasses, while Creepypasta has its own brand of horror and mystery. You could start by choosing the right characters to cross over. If you pick Daredevil, his enhanced senses could be used to detect the lurking Creepypasta threats that are often hidden in the shadows. The story should also have a consistent plot. Maybe the Creepypasta entities are attracted to the power sources in the Marvel universe, like the Infinity Stones. This creates a reason for the two to interact. And when the characters meet, their reactions should be believable. A young hero like Spider - Man might be initially scared but then find his courage to face the Creepypasta horrors, just like he does when facing new villains in his own universe.
To make it believable, the writer should study the cultures and races of Skyrim. If Hickup is going to interact with the Nords, for instance, they need to understand the Nord values, their traditions, and how they view outsiders. Hickup's actions and reactions should be in line with what would be expected in the Skyrim setting. Also, the writer should be consistent with the rules of the Skyrim world, like the limitations of magic, the power dynamics between different factions, etc. This way, the crossover feels more natural and not just a forced combination.
One idea could be a crossover with the Doctor Who universe. The Avengers could team up with the Doctor to fight a common enemy that threatens both their universes. Maybe Thanos somehow gets access to Time Lord technology and the combined forces have to figure out how to stop him from using it to rewrite all of reality.
Perhaps a fanfiction where the Infinity Stones in the Endgame have an unexpected effect on certain anime characters. These characters start to develop new abilities or forms that are a blend of their anime selves and the power of the Stones. This could lead to a whole new dynamic in the fight against Thanos, as the Avengers have to figure out how to work with these newly - empowered anime allies.
A great plot could be that Thanos somehow discovers the power of the Greek gods and tries to steal it for himself. He starts by attacking Camp Half - Blood. The Avengers, who are aware of some strange energy signatures coming from that area, go to investigate. There they meet Percy and his friends. At first, there is mistrust, but they soon realize they need to work together. Percy and his friends help the Avengers understand the magic and powers related to the Greek gods, while the Avengers offer their high - tech weaponry and combat skills. They then embark on a journey to stop Thanos from achieving his goal, facing many challenges along the way, including some Greek monsters and Thanos' minions.
Gandalf from The Lord of the Rings. Imagine him showing up in the Marvel universe, using his magic to help the Avengers. His wisdom and powerful spells could be a great addition, especially in a battle against a powerful foe like Thanos. He could also offer different perspectives on heroism and sacrifice.
Fanfiction adds to the Avengers Endgame experience by filling in the gaps. The movie has a lot going on, and there are many untold stories. Fanfiction can take a small moment from the movie, like Thor's struggle with his weight and self - esteem, and expand on it, making it more relatable and in - depth.
First, decide which two (or more) universes you want to cross over. Then, think about a central plot that can bring the characters from both universes together. For example, if it's 'Endgame' and 'Doctor Who', maybe the Time Vortex is malfunctioning and affecting the Avengers' timeline. After that, start with an engaging opening scene, like the Avengers witnessing a strange time - related phenomenon that leads them to the Doctor.