What are some interesting plot ideas for Shirou Emiya Archer crossover fanfiction?

Another plot could involve Shirou reincarnated in a modern superhero world. He might struggle to fit in at first, but then realizes his abilities can be used to fight super - villains. His noble phantasm could be adapted in a unique way to combat the new threats in this world.

One interesting plot idea could be that Artoria Archer and Shirou Emiya are forced to team up in a strange magical tournament. They start off distrusting each other, but as they face various powerful opponents, they gradually learn to work together and understand each other's motives better. For example, they might encounter a foe who can manipulate time, and they have to rely on Artoria's combat experience as an Archer and Shirou's determination to find a way to defeat the enemy.

One plot idea could be that Archer and Emiya find themselves in a strange, alternate dimension where the rules of magic are completely different. They have to team up to figure out how to get back to their own worlds while facing off against new and unexpected enemies. Another could be a situation where they are forced to compete in a magical tournament set up by a mysterious entity, but end up realizing they have more in common than they thought and decide to work together instead of against each other.

One plot idea could be Dark Shirou in a post - apocalyptic world where he uses his skills to survive and rule a small territory. Another could be his journey to find a way to reverse his dark transformation. Or a plot where he has to face his darker self in a psychological battle within his own mind.

One plot idea could be Shirou Emiya finding himself in the world of Fairy Tail and having to adapt to the magic - based society. He might try to use his Reality Marble in unique ways to combat the dark guilds. Another could be him teaming up with Natsu and his friends to take on a powerful, otherworldly threat that has somehow entered the Fairy Tail universe. He could also learn new forms of magic from the wizards in Fairy Tail, like learning how to incorporate Fairy Tail - style elemental magic into his existing abilities.

Another plot could be that Shirou discovers a new, highly competitive gamer community. He starts from the bottom but his determination and strategic thinking, which he has from his heroic deeds, help him rise through the ranks. He might make new friends and rivals in this community.

A great Shirou Emiya crossover fanfic is 'Shirou and the Avengers'. Imagine Shirou in the Marvel Universe. He could project Mjolnir and use Thor's power. His selfless nature would fit well with the Avengers' values. Also, 'Shirou in the Dragon Ball Universe' is fascinating. He might train with Goku and learn ki control, while also showing his own swordsmanship skills against powerful foes in that universe.

One idea could be Shirou using his projection magecraft in the Highschool DxD world to create unique weapons during battles against the devils or fallen angels. For example, he might project Excalibur to fend off a powerful devil attack. Another plot could involve Shirou forming an alliance with Issei and his group, teaching them about his different combat techniques and how to better strategize in fights. He could also have a romantic sub - plot with one of the female characters from Highschool DxD, like Rias, where his noble and self - sacrificing nature attracts her.

One idea could be Shirou finding himself in the Rosario Vampire world and having to adapt to its unique rules. Maybe he uses his skills from his own world to protect the school from various threats that are different from what he's used to.

One interesting concept could be the combination of Archer Emiya's combat skills with the unique abilities in RWBY. For example, his archery skills might interact in new ways with the Dust - based weapons of RWBY. Another concept could be the cultural clash between Archer's origin world and the world of RWBY. His more serious and battle - hardened nature might contrast with the sometimes more light - hearted or inexperienced characters in RWBY, leading to interesting character development moments.