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.
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.
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.
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.
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.
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.
Kratos might win. He has fought and defeated many powerful gods in his own world. He is not only physically strong but also very strategic. He could analyze the Hulk's movements and find his weaknesses. The Hulk, while strong, is more of a brute force fighter. Kratos could use his Blades of Chaos to keep the Hulk at a distance and then strike when the opportunity arises. Also, Kratos has faced opponents much larger than him before and has always found a way to win.