Conflict is a very common theme as well. There are often conflicts between Percy and the new characters he meets, either because of misunderstandings or because they have different goals. And there's also the overarching conflict of Percy trying to find a way back home or to reverse his banishment. This conflict drives the plot forward and keeps the story exciting.
One popular 'Percy Jackson Banished Crossover Fanfiction' is 'The Banished God'. In it, Percy is banished to a different realm and has to find his way back while crossing over with characters from other mythologies. It has an exciting plot with lots of action and character development.
It could be Ares. He is often portrayed as a violent and unpredictable god. Percy might banish him if he goes too far in causing wars and chaos among mortals. His banishment would have a huge impact on the battlefields of the mortal world.
One common theme is redemption. Naruto, being banished, often has to prove himself all over again in the new crossovers, seeking redemption for whatever led to his banishment in the first place.
Well, 'percy and zoe banished fanfiction' could potentially tell a story of Percy and Zoe being sent away from a certain place or group. Maybe it's set in a world full of magic and mythical creatures, and they've been banished due to some conflict or a misdeed they were wrongly accused of. It could explore their journey outside of their normal environment, how they survive, and what they learn about themselves and each other during this banishment.
One possibility could be that they are banished due to a false accusation. Maybe someone in the camp frames them for a serious crime they didn't commit, like stealing a powerful magical artifact. So, they are forced to leave and then have to prove their innocence while on the run from those who banished them.
Another common character might be Superman. If it's a crossover with the DC universe, Superman's sense of justice and his acceptance in his new world (Earth) could contrast with Naruto's banishment. Naruto could learn a lot from Superman about using his powers for good and also about being a symbol of hope, which could inspire him to find his own way to be a positive force even after being banished from his clan.
One popular 'Naruto banished crossover fanfiction' is 'Naruto in Another World'. In this fic, Naruto is banished from Konoha and ends up in a different universe where he has to adapt to new powers and challenges. It's a really exciting read.
To write a great Naruto banished married crossover fanfiction, start with a strong premise. Decide early on why Naruto is banished and who he is married to. Let's say he's married to Temari. The banishment could be because of a prophecy that some in Konoha misinterpret. For the crossover, if it's with a world of mythical creatures, research those creatures. Develop the relationship between Naruto and Temari. Maybe they have different views on how to deal with the new world they are in. Write engaging dialogue that shows their personalities and how they grow as a couple in this new and difficult situation.