The character interactions are often the most interesting part. For example, when characters from different Marvel groups meet, like Iron Man and Captain America from the Avengers meeting Wolverine from the X - Men. Their different personalities can lead to some really fun dialogue and tense moments.
The exploration of different powers and abilities. When heroes from different backgrounds team up, we get to see how their powers work together or clash. In some Avengers original crossover fanfiction, Thor's godly powers combined with Scarlet Witch's magic create some truly spectacular and unexpected effects that add a lot of depth to the story.
A really cool one is 'Avengers and Doctor Strange: Mystic Crossovers'. It focuses on how the Avengers team up with Doctor Strange. The fanfiction delves deep into the magic side of the Marvel Universe and shows how the Avengers' physical strength and Strange's magic combine to face a powerful dark force. It has some great plot twists and keeps you engaged throughout.
Perhaps in the fanfiction, Bonnie is in a situation where she needs the protection of the Originals. As she stays with them, she starts to influence their way of thinking, and they in turn introduce her to a different side of the vampire world. This interaction could lead to a romantic relationship between Bonnie and one of the Originals, while also facing challenges from the vampire and witch communities.
One interesting story could be about the Avengers crossing over with another superhero team from a different universe. They might have to team up to fight a common enemy that is threatening both of their worlds. For example, if they cross over with the X - Men, they could combine their powers to take on a powerful mutant villain who has the ability to control minds and manipulate reality.
One idea could be that the Avengers get transported to a Disney fairy - tale world. For example, they end up in Arendelle from 'Frozen'. Iron Man could try to figure out how to adapt his suit to the cold, while Captain America tries to lead the way through the icy terrain. Thor might find similarities between the magic in Arendelle and Asgardian magic.
Well, perhaps the Infinity Stones somehow end up in the world of The Incredibles. This attracts the attention of both the Avengers and the Parr family. The two groups initially have some misunderstandings as they try to claim the Stones. But then they realize that a powerful new villain, created by the combined energy of the Stones, is emerging. So, they join forces. Dash's super - speed could be useful for quickly transporting the Stones, while Thor's lightning powers could help in battles against the villain's minions.
One possible plot could be that Oliver Queen gets transported to the Avengers' universe. He teams up with Hawkeye, sharing their archery skills and combat tactics. They could go on a mission to stop a new threat that combines the technology of the Arrowverse and the super - powered enemies of the Avengers.
Another concept could be that one of the NCIS agents has a family member who is in danger because of a supervillain's plot. The Avengers get involved to protect the agent's family, but the NCIS team doesn't trust them at first. Gibbs would be very protective and suspicious. As the story progresses, they all learn to work together. Ziva could show off her combat skills to Black Widow, and they could have a friendly sparring match while sharing their combat experiences.
One idea could be that Oliver Queen gets transported to the Avengers' universe. He could teach them some of his stealth and archery skills. Maybe he helps Hawkeye improve his arrow techniques. Another idea is that the Avengers come to Star City. They help Oliver fight a new, super - powered villain that is too much for him to handle alone. The Avengers' powers and teamwork could combine with Arrow's street - level fighting style in an interesting way.
A cool plot might be that the Tailed Beasts in the Naruto world are being targeted by an unknown force from the Marvel universe. The Avengers, thinking it could lead to a greater threat to both universes, come to help. Naruto and the Avengers have to work together to protect the Tailed Beasts. Hulk could have an interesting interaction with the Tailed Beasts, perhaps learning from them how to better control his rage, while the ninjas are amazed by Thor's lightning powers and try to incorporate some of that into their own jutsu.
One idea could be that Merlin uses his magic to help the Avengers in a battle against a powerful magical enemy. Maybe he disguises himself as a normal human at first and then reveals his true powers when the situation is dire.