A great plot could be that the Time Twins open a portal to a parallel time - line in Ninjago where the villains won in the past. Evil versions of the Ninja rule the land, and the real Ninja are sucked into this parallel world. They have to team up with the few remaining good characters in this world to stop the Time Twins from bringing this dark version of Ninjago into their own time - line. Along the way, they discover secrets about their own powers and the true nature of time in Ninjago.
Once upon a time in Ninjago, the Time Twins emerged from a time rift. Acronix was the first to step out, his eyes glinting with mischief. His brother, Krux, followed more slowly, looking around warily. They immediately set their sights on the city, planning to disrupt the timeline for their own gain. The Ninja, led by Lloyd, had to quickly figure out a way to stop them. Using their elemental powers, they tried to fight the Time Twins, but the twins' time - based abilities made it a difficult battle.
One possible plot could be that the ninjas from Ninjago accidentally stumble into the world of Chima while on a mission through a magical portal. They find that the animal tribes in Chima are facing a new threat that they can't handle on their own. The ninjas decide to help, using their unique skills. For example, Kai could use his fire powers to combat an ice - based enemy that the Chima tribes are struggling with. Meanwhile, the Chima characters could introduce the ninjas to their own ways of fighting, like using their vehicles and the power of Chi. This would lead to an exchange of fighting styles and strategies, and in the end, they would defeat the common enemy together and the ninjas would find their way back home.
In the story of the Time Twins in Ninjago, initially, their appearance was a shock as they started using time powers to disrupt the normal flow of life. They then set about changing important events in Ninjago's past to gain more power. However, the ninja discovered their lair and a great battle ensued. The ninja had to adapt to the time - warped environment the Time Twins created, which was a significant event in the fight against them.
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 possible plot could be that the Monkie Kid characters accidentally end up in the Ninjago realm. They meet the Ninja and at first there are misunderstandings as they don't know each other's powers and motives. But then they realize they have a common enemy, like an ancient evil that threatens both their worlds. So they team up, with the Monkie Kid using his magic staff and the Ninja using their elemental powers to fight this great evil.
Well, the Time Twins' story is full of twists. They came from a different time or dimension perhaps. They were bent on ruling Ninjago. They used their time powers in devious ways. For example, they could go back in time to change events to their advantage. The ninja had to learn to counter their time - based attacks and ultimately defeat them to restore peace in Ninjago.
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 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.
She could return with a new plan to redeem herself. Maybe she realizes the error of her ways after being away and tries to make amends with the ninjas. She might bring some new knowledge or power that could help in a new threat that's emerging in Ninjago.
Well, one possible plot could be that Pixal discovers she's pregnant and she and her partner (whoever that might be in the fan - created scenario) have to deal with the news. They might face challenges like how to balance their duties in the Ninjago world with the upcoming arrival of a new life.