Perhaps a powerful artifact in the Marvel universe starts causing chaos similar to the effects of the Shikon Jewel. Inuyasha's group has experience with such powerful and dangerous items. The Avengers, being the protectors of their world, reach out to Inuyasha and his friends. Black Widow could use her espionage skills to help Inuyasha track down the source of the trouble, while Hulk could provide the brute force needed in battles against the new threats created by this strange crossover.
One possible plot could be that the Shikon Jewel gets scattered across the Marvel universe. Inuyasha and his friends, like Kagome, have to team up with the Avengers to retrieve the pieces. Iron Man might be intrigued by Inuyasha's sword and try to study it, while Captain America could admire Inuyasha's fighting spirit. They'd face villains who also want the power of the Shikon Jewel, creating an epic adventure.
The plot could involve a spell gone wrong that merges the worlds of Inuyasha and the Avengers. Inuyasha might find himself in New York and be mistaken for a new kind of threat. Thor could sense a kind of otherworldly power in Inuyasha and initially be on guard. But as they learn about the situation, they join forces. Maybe the Avengers help Inuyasha deal with some of his old enemies like Naraku who have also been affected by this strange merging of worlds.
Characterization can be tough. Each character from both series has their own distinct personality. The Avengers have their own dynamics, and Inuyasha has his own temperamental nature. When bringing them together, the writer has to ensure that the characters stay true to themselves while also developing new relationships. For instance, Captain America's sense of justice might clash with Inuyasha's more self - centered approach to fighting at first.
There's 'Avengers Meet Inuyasha'. In this fic, the Avengers are on a mission that somehow opens a portal to Inuyasha's world. The Avengers are initially confused by the presence of demons and magic, but they quickly adapt. Inuyasha is not too happy about these new strangers in his land, but as the story progresses, they team up to fight a common enemy that threatens both their worlds. It's a great read for fans of both franchises.
It could be really interesting. Maybe Inuyasha's sword Tessaiga could be seen as a sort of Asgardian - like weapon by the Avengers. And Inuyasha himself, with his half - demon nature, would be a strange and powerful addition to the team. He could have some clashes with characters like Thor over who is stronger, or he might team up with Black Widow to take on some common enemies.
One possible plot could be that Inuyasha somehow gets transported to the Twilight world. He might initially be confused by the modern settings and the presence of vampires and werewolves. Bella could mistake him for a new type of supernatural being. And Inuyasha, with his sword and combat skills, could get involved in the ongoing feud between the Cullens and the werewolves in Forks.
Inuyasha and Thor could potentially be allies. They both have a sense of honor and are very powerful warriors. Thor with his hammer and Inuyasha with his sword could fight side by side against powerful enemies. Also, Captain America and Inuyasha might get along. Captain America would respect Inuyasha's fighting skills and determination, and Inuyasha would see Captain America as a worthy leader.
Inuyasha and Thor would be an interesting pairing. They both have a warrior - like nature. Thor with his hammer and Inuyasha with his sword could have some epic battles together against common enemies. They might also exchange stories about their different worlds and the powers they possess.
The plot could involve the Juubi's chakra influencing some of the demons in the Inuyasha world. Naruto arrives and has to figure out how to stop this chaos. He might teach Inuyasha some of his ninja skills, and Inuyasha in turn could show Naruto how to deal with the demons. They could also find that the Juubi has some ancient connection to a powerful artifact in the Inuyasha world, and they have to stop an evil force from using this connection for their own gain.
Well, one possible plot could be that Rick accidentally opens a portal to the Inuyasha universe while trying to find a new energy source. Morty gets dragged along and they meet Inuyasha and his gang. Maybe Rick's advanced technology could be mistaken for some kind of powerful magic by the characters in the Inuyasha world. And Morty could befriend Shippo, since they are both kind of the sidekicks in their respective groups.
A plot could involve a spell gone wrong in the Inuyasha world that opens a portal to the Disney realm. Kagome, being from a more modern world, recognizes some of the Disney elements. Mickey Mouse could be the first Disney character they meet. He helps them navigate this new world while Inuyasha is trying to find a way back home. Meanwhile, Disney villains might see Inuyasha as a threat and try to get rid of him. But Inuyasha, with his combat skills, manages to fend them off. In the end, they find a way to close the portal and return home, but not before creating some new friendships and memories.
Well, one possibility could be that the characters from Ice Age end up in the feudal Japan setting of Inuyasha. Sid could befriend Shippo, the fox demon. They might get into all sorts of comical situations together, like trying to find food in a world full of yokai. Manny, the mammoth, could be mistaken for a strange demon by some of the more superstitious villagers. And Diego might team up with Inuyasha to fight a common enemy, perhaps a powerful ice - based demon that threatens both their worlds.