What are some interesting concepts in 'fate crossover fanfic'?

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.

Another concept could be the alteration of the Holy Grail War in Fate Zero through crossovers. Maybe a new set of rules is introduced because of the crossover elements. This could change the strategies and alliances of the servants and masters, making for a completely different kind of battle and story compared to the original Fate Zero.

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.

In Fate Go fanfic, the concept of Servant backstories is often explored more deeply. For instance, a Servant's past life before they became a heroic spirit can be delved into. It could be about their family, their early life experiences that shaped them into the heroic figure they are. This adds more layers to their character. And the idea of Servant alliances against a common enemy that is not part of the original game's plot is also very engaging.

One interesting concept could be the exploration of different Servant backstories. For example, delving deeper into the past of a lesser - known Servant and how their history affects their actions in the fanfic's plot. Another concept might be the alteration of the Holy Grail War rules, which can lead to unique battles and alliances.

One interesting concept could be the unique power-ups or abilities the characters gain. For example, they might have powers related to time manipulation or elemental control that are specific to the fanfic's universe.

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.

Another concept is the Joker's influence on the story's tone. In a crossover with a more light - hearted or comical universe, the Joker could still bring his dark and menacing presence, which would create a really interesting contrast. His actions and words could disrupt the normalcy of that universe and force the other characters to deal with a level of chaos they're not used to.

Another concept could be a time - travel - based crossover. Suppose Doraemon crosses over with Doctor Who. They could both explore different time periods and dimensions together. Doraemon's Time Machine and Doctor Who's TARDIS are both means of time travel, but they have different functions and appearances. Their combined adventures would be full of mystery and discovery.

One interesting concept is character interactions. For example, seeing how characters from different timelines or universes react when they meet. Another is the alteration of established storylines. It can create unique plot twists.