Fate x

Perhaps a plot where the Holy Grail War from Fate Stay Night gets disrupted by the arrival of some key players from Fate Apocrypha. This could lead to new alliances and rivalries. Like Shirou from Fate Stay Night having to team up with a character from Fate Apocrypha, say Sieg, to face a common enemy that is after the power of the Grail in both their worlds.

One idea could be to have the Servants from Fate Grand Order interact with the events and characters of Fate Zero in unexpected ways. For example, Mash could end up in the middle of the Fourth Holy Grail War and try to prevent some of the tragedies from happening. She might team up with a young Kiritsugu, using her knowledge from the future to guide him. Another could be that a Grand Order Servant like Artoria Alter gets involved in the war and changes the power dynamics completely, as her dark and powerful nature would be a wild card in the already complex Fate Zero setting.

One really interesting Fate x Nanoha fanfiction is 'A Meeting of Magical Worlds'. It combines the unique magic systems of both series in an engaging way. The characters are well - written, staying true to their original personalities while also developing in new and exciting directions within the fanfiction's plot.

Rin Tohsaka from Fate Stay Night and Astolfo from Fate Apocrypha. Rin is a serious and intelligent mage, while Astolfo is a carefree and somewhat eccentric Servant. The combination of Rin's no - nonsense attitude and Astolfo's wacky behavior would make for some really interesting and humorous exchanges.

Rider from Fate Zero and Ozymandias from Fate Grand Order could be a fascinating pair. Both are powerful and prideful kings. They could engage in a battle of wits and power, or they could find common ground in their kingly natures. Maybe they would discuss their different kingdoms and the ways they ruled, and their conversations could be filled with grandiosity and philosophical debates about leadership and power.

One great Fate OC x Artoria fanfiction is 'The Unlikely Bond'. It delves into how an original character interacts with Artoria in a unique way. The OC has its own set of powers and beliefs that contrast and complement Artoria's. Another interesting one is 'A Meeting of Souls' which focuses on the emotional connection between the two. It shows how their different backgrounds lead to a deep and complex relationship.

One common theme is the clash of their personalities. Gilgamesh is proud and haughty, while Mordred is rebellious. Their interactions often involve power struggles and attempts to outwit each other.

One idea could be to have Taylor from 'Worm' end up in the 'Fate' universe and have to deal with the Grail War. Maybe she forms a pact with a Servant who is similar to one of her powers in 'Worm'.

The cultural clash between the Naruto world and the Fate Ruler world is also fascinating. Naruto's world is based on ninja clans and shinobi values, while the Fate Ruler world has its own set of rules and hierarchies. Stories that explore how characters from both worlds adapt to each other's cultures can be very engaging. For instance, a Naruto character might have to learn the proper etiquette in the Fate Ruler's court, or a Fate Ruler character might be shocked by the brutal training methods of the ninja. Another interesting aspect is the idea of destiny. In Naruto, characters often strive to change their fates, while in Fate Ruler, fate seems to be more set in stone. How these two concepts play out when the worlds collide can create some complex and thought - provoking plots.

One reason could be the lack of promotion. Many fanfiction writers don't have the means or knowledge to effectively promote their work. So, even if they create an interesting 'Naruto x Fate Stay Night' crossover, it may remain unnoticed.