What are some interesting concepts in Fate Zero crossover fanfiction?

Well, in Percy Jackson and Fate Zero fanfiction, a cool idea is the interaction between the gods in Percy Jackson and the mages in Fate Zero. Imagine the Greek gods having some sort of deal or conflict with the mages. Also, the idea of demigods being summoned as Servants in the Holy Grail War is really fascinating. It would completely change the dynamics of the war.

One interesting concept could be the unique interactions between servants from different Fate series. For example, seeing how a heroic spirit from one era would react to another's fighting style or personality.

One interesting concept is the combination of different Fate series characters in unexpected scenarios. For example, seeing characters from Fate/Stay Night interact with those from Fate/Grand Order. It can create unique storylines and character dynamics.

One interesting concept could be the combination of the Servant system from Fate and the Force in Star Wars. For example, a Jedi could be summoned as a Servant, bringing their unique lightsaber skills and connection to the Force into the Fate universe's battles. Another concept might be how the different classes in Fate, like Saber or Archer, would interact with the various species and factions in Star Wars.

One interesting concept could be how the gamer elements interact with the existing Fate Stay Night universe. For example, the protagonist might have a gamer interface that shows stats for the Servants, which could add a new layer of strategy to battles.

The fanfic might also explore different character backstories for the Servants and Masters. For example, it could delve deeper into their pasts and how those past experiences shape their actions during the war in ways that were not explored in the original 'Fate Zero'. This could add more depth to the characters and make the story more engaging.

One interesting concept could be alternative timelines. Writers might explore what would happen if certain events in the original 'zero no tsukaima' series occurred differently. For example, if Louise had chosen a different familiar. Another concept could be character development beyond what was shown in the anime or manga. Maybe Saito becoming even more powerful in magic in ways not originally depicted. And also, exploring different relationships between the characters, like a deeper friendship between Louise and her classmates that was only hinted at in the original story.

In Fate System Fanfiction, the power scaling is an interesting concept. Different authors may adjust the power levels of the Servants in unique ways. Some might make a relatively weak Servant in the original become extremely powerful in the fanfic, through new training regimens or unlocking hidden potentials. Also, the concept of the Grail's true nature can be explored differently. Instead of just being a wish - granting device, it could be something more sinister or have deeper, more complex functions. And the use of Command Spells in creative ways is another aspect. For example, a fanfic could have a Master use a Command Spell in a non - traditional way to achieve a surprising effect.

Perhaps Shirou from Fate Stay Night could find himself in the Re Zero world. He might use his skills as a mage and his determination to help Subaru in his quests. Their different outlooks on life and combat could lead to some interesting character development as they learn from each other.

One interesting concept could be the fusion of the Persona summoning system with the Servant system in Fate Stay Night. Imagine a character being able to summon both a Persona and a Servant, and how that would change the power dynamics and strategies in battles.