A good crossover story idea could involve a cosmic entity that is causing chaos in both the DC and Marvel universes. Wonder Woman, with her Amazonian strength and wisdom, teams up with the Avengers, each bringing their unique skills to the table. For example, Captain America's leadership and combat skills combined with Wonder Woman's combat prowess would make for an interesting dynamic. Or perhaps a villain has found a way to merge the two universes in a dangerous way, and the only way to stop it is for the Avengers and Wonder Woman to find a way to separate them again while also dealing with the new threats that have emerged from the merge.
One possible plot could be that a powerful new villain emerges that threatens both the Marvel Universe and Wonder Woman's world. The Avengers and Wonder Woman cross paths while investigating the strange occurrences related to this villain. They initially have some clashes due to their different methods and cultures, but then realize they need to work together. For example, Iron Man might be impressed with Wonder Woman's indestructible bracelets and try to analyze them, while Wonder Woman could learn about modern technology from Stark. Eventually, they combine their powers and skills to defeat the villain.
Another possibility is that there is a villain who is stealing technology from Stark Industries (where Spiderman sometimes gets his tech) and ancient artifacts from Wonder Woman's homeland. They are both independently investigating and then cross paths and decide to work together to stop the thief.
Another aspect could be the power dynamics. The Hulk's raw strength against Wonder Woman's strength and combat skills. Hulk might initially see her as a threat and lash out, but she could use her lasso of truth to calm him down. Black Widow could teach Wonder Woman some of her spy and infiltration techniques, which could be useful in a more covert mission against a new villain that emerges from the crossover of their two universes.
A cool scenario would be a battle royale - style crossover where Wonder Woman is brought into the Marvel universe to participate in a tournament. She has to fight against various Marvel heroes and villains, like Thor and Loki. As she progresses, she discovers that the real mastermind behind the tournament is trying to use the chaos to open a portal to another dimension. Along the way, she forms alliances with some of the Marvel characters and together they try to stop the evil plan.
A crossover could start with Wonder Woman being summoned to Asgard by some mysterious magic. She finds herself in a strange new world and is initially met with suspicion. Thor, being the more open - minded of the Asgardians, decides to help her figure out how she got there. Along the way, they discover that an ancient enemy from Thor's past has plans to use Wonder Woman's power to open a portal to a realm full of chaos. They then have to work together to stop this from happening, with Wonder Woman teaching Thor some new combat techniques she learned on Themyscira and Thor showing her the power of the Asgardian magic.
It could look like a chaotic and exciting adventure. Picture Wonder Woman arriving in New York through a portal. The Avengers are initially on guard but then realize she's there to help. They join forces to stop an alien invasion that's targeting both their worlds. The story would be filled with action - packed fight scenes, like Wonder Woman deflecting lasers with her bracelets while the Hulk smashes the alien ships.
One idea could be to cross the Avengers with the X - Men. Imagine Wolverine and Captain America teaming up for a mission, their different leadership styles would create interesting dynamics. Another could be crossing them with the Harry Potter universe. Picture Iron Man trying to figure out how magic works in Hogwarts. Or a crossover with the Justice League, seeing Thor and Superman in a battle of strength would be epic.
The interaction between Thor and Wonder Woman would be really interesting. They both have a connection to the gods in their respective universes. Thor could be curious about Wonder Woman's origin as an Amazon and her relationship with the Greek gods, while Wonder Woman might be intrigued by Thor's Asgardian powers and his hammer Mjolnir. Another interesting interaction would be between Hulk and Wonder Woman. Hulk's raw power against Wonder Woman's grace and combat expertise would make for some intense scenes, either in a sparring match or when facing a common enemy.
A good plot could involve a villain from the Homestuck universe creating chaos in the Avengers' world. The Homestuck characters come to help, but there are misunderstandings at first between them and the Avengers. However, as they start to understand each other's powers and motives, they form a strong alliance to defeat the villain.
One idea could be that a powerful new villain emerges who is a threat to both Gotham and Themyscira. Batman and Wonder Woman team up to track down the villain's lair. Batman uses his detective skills to analyze the clues while Wonder Woman uses her combat skills in the battles along the way.