Another concept is a more comical crossover. Shirou tries to adapt to the different rules and magic in the Fate Apocrypha world. He constantly gets into funny situations as he misunderstands the local customs and magic systems. For example, he tries to cook using Apocrypha - style magic ingredients and chaos ensues.
Perhaps a plot where Shirou is accidentally transported to the Fate Apocrypha world before the start of the war. He then uses his knowledge of the Fate universe to try and prevent the war from happening. Along the way, he meets the various characters and tries to convince them to find a more peaceful solution. This would involve a lot of character interactions and moral debates.
Well, cultural clashes are also a common theme. When Fate Apocrypha crosses over with another series, say from a different country or with a very different cultural background, there are interesting cultural exchanges and clashes. For instance, if it crosses over with a historical or myth - based series, the different interpretations of the same myths or historical events can be explored. And of course, the theme of survival is often there. Characters have to find ways to survive in the new and often dangerous situations created by the crossover.
A reaction fanfiction in Fate Apocrypha could explore the characters' responses to various events. For example, how the Servants react to unexpected twists in the Holy Grail War. It might be interesting to see how characters like Siegfried or Mordred would react to a rule change in the war.
Yes, there might be. The Fate series and Naruto both have large fan bases, and crossovers are quite popular among fans. Some creative fans may come up with the idea of combining elements from Fate Apocrypha and Naruto while also including a god - like figure in their fan - made stories.
Well, there's this 'fate apocrypha crossover fanfiction' where it crosses over with the world of Attack on Titan. It has some really cool fight scenes between the Titans and the Servants from Fate Apocrypha. The story explores how the different powers and ideologies of both worlds collide. There are also some that cross over with the DC Universe, imagining battles between superheroes and Servants, which is quite thrilling to read.
Another interesting concept is to create an alternate ending. Maybe the two factions end up working together against a greater threat that was hidden all along, like an ancient evil that awakens during their battle.
An OC (Original Character) in Fate Apocrypha fanfiction can bring fresh perspectives. It allows fans to explore uncharted territories within the Fate Apocrypha universe. For example, an OC could be a new Servant with a unique backstory and abilities, which might interact with the existing characters in interesting ways. Fanfiction writers often use OCs to fill in the gaps they feel exist in the original story or to create their own unique story arcs that still fit within the overall theme and lore of Fate Apocrypha.
One idea could be to explore how Hercules' incredible strength affects the Fate universe. Maybe he is summoned as a Servant in a Grail War and his brute force challenges the traditional battle strategies of other Servants. His Twelve Labors could also be incorporated in some way, like each Labor being a trial he has to face within the context of the Fate story.
A third idea is a crossover where the characters from both universes have to team up to face a common enemy. Maybe an ancient evil that threatens both the world of Fate and the DxD world. They would need to combine their powers and strategies, like the devils using their demonic powers along with the Servants' unique abilities.
One popular trope is the 'hidden power' trope. The OC might start off as an unassuming character but gradually reveals a powerful and unique ability that changes the course of the Holy Grail War. Another is the 'love interest' trope, where the OC becomes romantically involved with one of the canon characters, adding a new layer of drama to the story.