In a Ninjago time travel fanfiction, the ninjas could be sent forward in time to a post - apocalyptic version of Ninjago. They would have to figure out what went wrong and then travel back to their own time to prevent it from happening. This could involve battles with future versions of their enemies who have evolved into even more dangerous foes.
One idea could be the ninjas traveling back in time to the very beginning of Ninjago's creation. They could witness the forging of the Golden Weapons and try to prevent an evil force from stealing them at that time. This would change the whole course of Ninjago's history and create a whole new set of challenges for the ninjas.
One idea could be exploring the backstories of the characters from the Hands of Time arc in more detail. For example, the relationship between Kai and Nya's parents before they disappeared. Another could be a time - travel adventure where the ninja go back further in time than in the original story to prevent an even greater threat.
One idea could be exploring the sister's backstory in more detail. Maybe she had a special training or a hidden power that was only known to a few. Another could be a story where she gets separated from the main group and has to find her way back while facing her own personal demons.
One idea could be creating an OC who is a long - lost relative of one of the main ninjas. For example, a cousin of Kai who has been living in a far - off land and has a unique fire - based power that's different from Kai's. Another idea is an OC that is a hybrid of two different elemental powers, like water and earth, and they struggle to fit in with the normal elemental groups. Or an OC who is a master of an ancient and forgotten form of Ninjago martial arts that the ninja team discovers and tries to learn from.
One idea could be that the ninjas from Ninjago end up in the world of Slugterra by some magical portal. They then have to learn about slug slinging and team up with the local sluggers to fight a common enemy. Maybe an ancient evil that threatens both their worlds.
In a Ninjago Star Wars fanfiction, you could explore what would happen if the Ninjago ninja were Force - sensitive. Kai, for instance, could struggle with the temptations of the Dark Side due to his hot - headed nature. The story could follow his journey as he tries to master the Force while also staying true to his ninja values. Meanwhile, the other ninja would also have their own experiences with the Force, and they'd all have to face new challenges in a universe filled with Jedi, Sith, and other Star Wars elements.
You could write a fanfiction where Aspheera accidentally releases an even more dangerous force while trying to regain her full power. The ninjas then have to work with her, despite their differences, to stop this new threat. This would involve a lot of character development for both the ninjas and Aspheera as they learn to trust each other.
A possible plot for this crossover fanfiction is that the worlds of Ninjago and Chima start to merge due to some magical mishap. This causes chaos as the different species and cultures collide. The heroes then have to figure out how to separate the worlds again. For example, the ninja from Ninjago might have to work with the lions from Chima. Another idea is that a group of villains from both worlds team up and the heroes have to form an alliance of their own. They would need to overcome their differences and learn from each other's fighting styles. There could also be a story where a Ninjago character is transported to Chima and discovers a long - lost relative from there, which adds a personal touch to the adventure.
One idea could be the next generation facing a new, more powerful enemy that combines the powers of all the previous villains. They'd have to learn from their parents' stories and develop new skills to defeat it.
One idea could be a time - travel plot where Lloyd and Nya are sent back in time to the early days of Ninjago. They have to work together to find a way back while also ensuring that they don't accidentally change the future. Another plot could involve them getting trapped in a mysterious realm and having to rely on each other's unique skills to escape. For example, Lloyd's elemental powers and Nya's water - based abilities.