A believable plot for this crossover can be built around the idea of a forbidden alliance. Let's say a rogue Master discovers an SCP that can grant them unlimited mana. In exchange, they have to help the SCP break free from its containment in the SCP world. This Master then forms an alliance with some anti - hero Servants who are also interested in the power the SCP can offer. The other Masters and more heroic Servants must then stop this alliance before it's too late. Along the way, there could be many sub - plots such as the discovery of the true nature of the SCP, the internal conflicts within the Servant ranks about how to deal with this new threat, and the struggle of the good Masters to keep their Servants loyal in the face of this powerful and alluring new enemy.
To create a believable plot, start with a simple premise like an SCP escaping into the Fate/GO world. This SCP could start causing chaos, and the Servants would be the ones with the power to stop it. But as they try to deal with it, they discover that the SCP has some strange connection to the Grail or the Servant summoning system. For example, the SCP might be able to absorb Servant energy. As the plot progresses, the characters would have to make difficult decisions. The Masters might be tempted to use the SCP's power for their own gain in the Grail War, while the Servants would have to decide whether to follow their Masters or do what's right.
Perhaps in an 'scp fate go crossover fanfiction', the concept of Command Spells could be linked to SCP artifacts. Imagine a Master finding an SCP that gives them an enhanced form of Command Spells, but with a dangerous side - effect. Or a Servant could be bound to an SCP - like entity instead of a traditional Master - Servant contract. For instance, a Servant of the Berserker class could be paired with an SCP that enhances their rage and power but also slowly drives them madder than they already are in their Berserker state.
First, research both universes thoroughly. Know the capabilities of the Halo Spartans, their weapons, and the political situation in their world. Similarly, understand the powers, backstories, and relationships of the Overwatch characters. Then, find a common ground for them to interact. It could be a threat that affects both universes or a shared goal like exploring an ancient artifact that has significance in both worlds.
Research the uke concept and find ways to integrate it into Naruto's world. If the uke is often seen as a more submissive role, Naruto could be forced into that role due to some sort of magic or new social order. But he could still fight against it in his own Naruto - like way. You could also introduce new characters that are key to the uke - Naruto dynamic, like a powerful antagonist who misinterprets Naruto as weak because of the uke - like situation.
First, study the lore of both games. Know the rules of how powers work, the social structures in each world, etc. Then, find a common ground. Maybe it's a shared threat like a powerful, otherworldly entity that is attracted to the unique energy signatures of the powers in both universes. Make sure the characters' actions are in line with their personalities. For example, Cole is often driven by a sense of justice, so he would likely approach a situation differently than Alex, who has more of a survival - of - the - fittest mentality.
To create a believable plot, first, you need to understand the lore of both Kitsune and Naruto. For example, Kitsune are known for their trickery and magic. You could incorporate this into the story by having a Kitsune character play tricks on Naruto and his friends, but in a way that ties into the overall plot, like leading them to a hidden power or a secret enemy.
First, understand the core elements of both Big Hero 6 and the other crossover element. For example, if it's a crossover with a magical world, find a way to make the science - based technology of Big Hero 6 interact with magic. Maybe a magical event disrupts the technology in San Fransokyo, and the team has to find a way to fix it with the help of the new crossover characters. Second, develop character relationships. Show how the characters from both worlds react to each other, whether it's with suspicion or immediate friendship. Third, have a clear goal for the story. It could be to save both worlds from a common threat or to solve a mystery that involves both universes.
To create a believable plot, first, you need to establish the rules of the nazi zombies world clearly. For example, how are they created, what are their weaknesses? Then, when introducing characters from other universes or stories, make sure their abilities and personalities are consistent. If a character is known for being brave and resourceful in their own world, they should act that way in the crossover. Also, give a good reason for the crossover to happen, like a magical portal or a scientific experiment gone wrong.
First, you need to understand the rules of both universes involved. For example, if it's a crossover with Star Wars, you have to know how the Force works in Star Wars and how alchemy functions in Full Metal Alchemist. Then, find a common ground. Maybe there's a similar power source in both worlds that can be the starting point for the plot. Like a dark energy in Star Wars and a corrupt form of alchemy in Full Metal Alchemist.
To create a believable plot, think about the characteristics of spiders and how they can be incorporated into the Harry Potter world. Spiders are often associated with mystery and hidden places. So, in the fanfiction, the spiders could live in a hidden part of Hogwarts that no one knew about. Harry Potter accidentally discovers this place. The spiders there have a prophecy about a wizard who will save them from a great danger. They believe Harry is that wizard. But there are also other forces at work, like some Slytherin students who want to use the spiders for their own dark purposes. This creates a complex web of relationships and conflicts that make the plot believable.
A believable plot could also involve a magical accident that somehow links the two worlds. For instance, a spell gone wrong by a Hogwarts student could open a portal to the Destiny world. This would then lead to characters from both sides having to work together to close the portal and deal with the consequences of the two worlds colliding. The characters' personalities should remain consistent. So, Luna Lovegood would still be her dreamy, yet perceptive self, and she might be the one to notice some unique similarities between the magic in both worlds.