One idea could be that Percy and Jason have to team up to save a group of demigods who are trapped in an ancient, cursed maze. They use their combined powers of water and lightning to break through the various obstacles. Another could be a story where they swap powers for a day and have to deal with the consequences. For example, Percy tries to control lightning but accidentally zaps some of their friends' hair into crazy styles, while Jason struggles to keep the water from going wild when he tries to use Percy's power.
One idea could be that Percy and Leo team up to build a super - cool underwater vehicle using Leo's mechanical skills and Percy's knowledge of the sea. Another could be them going on a quest to find a lost artifact that has powers related to both fire and water. They could face challenges like sea monsters and mechanical traps along the way.
One plot idea could be that Percy and Jason discover they are twins in a very unexpected way. Maybe during a quest, they start having the same strange dreams and realize they have a deeper connection. Another could be that they have to team up against a powerful enemy who is specifically targeting them because of their unique twin bond.
One idea could be that they team up to face a new and powerful monster that neither of them could defeat alone. Maybe it's a hybrid of a Greek and Roman mythical beast.
One idea could be a quest where Percy, Jason and Piper have to team up to find a lost artifact that has the power to control the elements. They face various mythical creatures along the way and have to use their combined powers to overcome obstacles.
One idea could be Jason and Percy having to team up for a special quest that no one else can handle. Maybe they have to retrieve a powerful artifact hidden deep in a dangerous realm. They start off not getting along well because of their different leadership styles, but as the quest progresses, they learn to respect each other and combine their powers in unique ways to overcome obstacles.
They could get lost in an old, abandoned part of the railway. Thomas might be a bit scared at first, but Percy stays calm. Together, they explore the area, find old railway artifacts, and then figure out a way to get back to their normal tracks. It would be a story of discovery and courage.
One interesting plot idea could be Jason and Citra starting a new life together in a small, idyllic town. They could face challenges like renovating an old house and getting to know the quirky locals. Another could be them dealing with a long - lost relative who suddenly appears and causes some drama in their marriage. Or perhaps they go on an adventure together, like a journey to a far - off land where they discover new things about each other.
Another plot could be set in an alternate universe where Piper and Jason have different roles. For example, Piper could be a powerful sorceress and Jason a knight, and they have to team up to defeat an evil dragon that is terrorizing the kingdom. This would allow for a fresh take on their characters and relationship.
A plot could involve a dark future where Jason and Tim are on opposite sides of a war in Gotham. The city has been overrun by a new, powerful villain. Tim is still trying to uphold the Bat - family values while Jason has his own ideas of how to save the city. Eventually, they realize they need to work together to defeat the common enemy. It could show their growth and how they overcome their ideological differences.
Maybe Aria and Jason are babysitting a friend's baby. The baby has some sort of special power that they initially don't understand. As they care for the baby, they start to notice strange things happening around it, and they have to protect the baby from those who might want to use its power for evil.