One possibility is that it could focus on a mentoring aspect. Old Kratos, with all his wisdom and experience, could guide young Kratos. Maybe he'd show him different combat techniques or how to better control his rage. It could also be a story of self - discovery for young Kratos as he sees his future self and realizes the potential path he could take.
Their interaction would be tense at first. Young Kratos, full of energy and unbridled aggression, might see old Kratos as a threat or an obstacle. Old Kratos, on the other hand, would be more reserved and cautious. But as they start to communicate, they would find common ground in their shared past and their connection to their family.
A plot could be that they meet during a great chaos. Kratos is in the middle of a battle against some powerful demons. Jesus appears and uses his powers to calm the situation. Kratos is both amazed and a bit skeptical. They then team up to face a greater threat. Jesus' divine powers combined with Kratos' brute strength could make for an interesting story of them learning from each other's combat styles and outlooks on life.
An 'Avengers meets Kratos' fanfiction could be really interesting. Kratos has his own set of moral codes which could clash or align with the Avengers'. Captain America might try to understand Kratos' motives and see if he can be trusted. Black Widow could use her skills to spy on Kratos initially to assess the threat level. And then, as the story progresses, they could find common ground in protecting the world or the universe from a greater evil.
One possible plot could be that Percy is a young warrior who looks up to Kratos. He sets out on a journey to find Kratos and learn from him. Along the way, he faces many challenges similar to those Kratos has faced in the God of War series. Maybe he has to battle mythical creatures and overcome his own inner demons, all while hoping to one day be as great as Kratos.
In a fanfiction where Percy Jackson meets Kratos, it could be a clash of cultures. Percy is used to the world of demigods, with its camps and quests. Kratos has his own journey of vengeance against the gods. They might initially be at odds, with Kratos seeing Percy as a product of the very gods he despises. But as they get to know each other, they could learn from one another. Percy could teach Kratos about the more positive aspects of the gods' influence, and Kratos could show Percy how to be more self - reliant in a fight.
The plot of a Kratos and Aphrodite fanfic could center around Aphrodite falling in love with Kratos at first sight. She tries to win his heart by using her beauty and allure. But Kratos is oblivious to her advances as he is preoccupied with his own past traumas. As she persists, he starts to open up to her, and they form an unlikely bond. This bond then becomes the foundation for them to face a common enemy that threatens both their worlds.
One possible plot could be that Kratos discovers he has a baby in a very unexpected way. Maybe he finds the baby left at his doorstep. He initially has no idea how to take care of it but as time passes, he starts to learn and forms a strong bond with the baby. He protects the baby from all the threats in his dangerous world.
They could also have a philosophical discussion. Past Kratos has a lot of unresolved issues, especially regarding his past deeds. Future Kratos, having had more time to think about it all, could share his insights. For example, he might talk about how he has come to terms with his past and how past Kratos can start that journey too. This encounter could be a turning point for past Kratos's character development.
It could be a story where Naruto, inspired by Kratos' strength and tenacity, decides to train in a similar way. Maybe he takes on some of Kratos' combat styles and uses them in the Naruto universe, like using his chains to grapple enemies just like Kratos' Blades of Chaos.
The characters' interactions would be complex. Hulk might just charge at Kratos out of instinct, seeing him as a potential challenger. Kratos, on the other hand, might hold back at first, trying to gauge the Hulk's power. Iron Man would likely try to scan Kratos to understand his abilities. Thor could start a conversation about their different pantheons.