Maybe the complex relationship between the two characters. The idea of one character hurting the other can create a lot of drama and tension, which is often interesting in fanfiction.
You can start by looking on fanfiction.net. It has a large collection of various fanfictions, including those related to Zane Truesdale and original characters. Just use the search bar and type in relevant keywords.
Well, in some fanfictions, Jaden Yuki might not directly fight the wicked gods. Instead, he could be trying to understand their motives. He might befriend some characters who have knowledge about the wicked gods and through that knowledge, he tries to find a way to either co - exist or stop their evil plans.
There are so many fanfictions out there that it's difficult to specifically point out ones related to 'zane truesdale hurts syurs'. You could join relevant fan groups or forums and ask the members there. They might be able to direct you to some good ones.
One great Zane Truesdale OC fanfiction is 'The Rising Star of Zane'. It focuses on an original character who becomes Zane's protégé in the dueling world. The story is full of exciting duels and character development.
It could be an old rival from his past dueling days. Someone who has always been envious of Zane's success and finally sees an opportunity to take him down, either physically or in a more metaphorical sense like ruining his reputation.
One common theme is the exploration of different dueling universes. Since Jaden is from 'Yu - Gi - Oh! GX', crossovers often take him to other 'Yu - Gi - Oh!' series or even other card - game - based anime worlds to experience new dueling rules and challenges.
The character development. If the author can take Jaden Yuki's known traits from the original series and expand on them in a new and exciting way within the fanfic, it can be really interesting. For example, showing a more vulnerable or passionate side of him.
For Fem Jaden, you can focus on her femininity and how it interacts with her personality. For example, if she's strong - willed, show how she uses her grace and charm to get what she wants. For Zane, you could develop his character by highlighting his loyalty. Maybe he has a code of honor that he follows strictly. This could be a source of conflict and also a way to bring him closer to Fem Jaden.
The plot could involve Jaden and Zane getting trapped in the Dark World. Maybe they have to fight against dark creatures to find their way back home. They could discover new powers within themselves during this harrowing adventure.