One idea could be that Jak meets an alternate version of himself from a different dimension. This could lead to a lot of self - discovery as they compare their lives and experiences.
A cool plot could involve Jak stumbling upon a hidden civilization that has been observing him. He has to figure out their motives and whether they are friend or foe while also dealing with the usual threats in his world.
Maybe Jak crosses paths with a long - lost relative who has a secret power or knowledge that could change Jak's destiny. For example, this relative could know the true origin of Jak's powers.
You can start by giving them distinct physical traits. For example, a character could have a unique hair color or a strange birthmark. This makes them stand out visually.
One idea could be a human from our world getting mysteriously transported into the Jak and Daxter universe. They could start off as a confused bystander but gradually learn the ways of that world and end up helping Jak and Daxter on one of their quests. Maybe they have some unique knowledge from our world, like basic science concepts, that can be applied in unexpected ways in the game's world.
One idea could be that Jak and Daxter end up in a different game world, like a medieval fantasy realm. They have to use their skills in a new way, for example, Jak's agility to climb the tall towers in the fantasy land and Daxter's small size to sneak into places. Another could be a crossover with a sci - fi world where they encounter advanced technology and have to figure out how to work with it. Maybe they meet alien species and have to team up with them to save both their own world and the new one.
One idea could be characters from different storylines suddenly swapping places in their respective universes. For example, a hero from one story finds themselves in the villain's role in another. Another could be two characters who were never meant to meet in their original stories, meeting in the fanfic and changing each other's fates.
One interesting plot could be exploring how Naruto's new powers from the Six Paths change his relationships. For example, how does he interact with Sasuke now that he has such god - like abilities? Maybe he becomes more of a mentor figure to the younger generation in the village.
One idea could be exploring Naruto's new abilities as the Sage of 6 Paths in more detail. Maybe he discovers a hidden power within the Sage mode that no one knew about before.
One idea could be a story where the Mandalorian has to team up with an old enemy to fight a new, greater threat. Maybe a powerful Sith Lord emerges and they have to put aside their differences.
One idea could be exploring a different origin for Toothless. Maybe he was part of an ancient dragon tribe that was thought to be extinct. Another could be a story where Hiccup discovers a new dragon species that has unique abilities and forms an alliance with them. A third idea is a time - travel fan fiction where Hiccup goes back in time to prevent a great dragon war from ever starting.
A great plot for Warframe fan fiction could be a Tenno getting trapped in a parallel dimension where the rules of the Origin System are all messed up. They have to find a way back while dealing with strange versions of familiar enemies. Or perhaps a story about a Tenno who discovers a hidden Orokin vault that contains not only powerful weapons but also a secret that could change the balance of power in the Origin System. Also, a plot about a Tenno's struggle to control a newly acquired and extremely powerful Warframe that has a mind of its own could be really engaging.
Well, you could have a survivor fan fiction where a contestant has a hidden skill, like being able to communicate with animals on the island. This could give them an edge in finding food and avoiding danger. Or perhaps a story where there's a traitor within the group, someone who is secretly working with the show's producers to create more drama. Also, a plot where the survivors find a map that leads to a hidden part of the island with a bountiful supply of food and shelter.