For a good character interaction between Garou and Saitama, start with their fundamental differences. Saitama is a hero who is bored with the lack of challenge, while Garou hates heroes. Have them start with a fight, but make it a comical one where Saitama's nonchalance annoys Garou to no end. This can lead to some great dialogue exchanges where Garou tries to taunt Saitama into taking him seriously, but Saitama just doesn't care.
Well, in the fanfiction, the moment when Cosmic Garou tries to counter Saitama's attacks with his own new - found cosmic powers is really exciting. He has evolved to a whole new level, and seeing how his powers match up against Saitama's is a big part of the thrill. Maybe he creates some sort of cosmic energy blast that Saitama has to dodge or block in an unexpected way.
The battle between Saitama and Cosmic Garou in the fanfiction would have a catastrophic effect on the environment. First, Saitama's initial attacks might send out concussive forces that uproot trees and scatter them like matchsticks. Cosmic Garou's response could involve creating some sort of cosmic vortex that sucks in everything around it, from small pebbles to large boulders. As the fight progresses, the area around them would become a desolate wasteland, with fires raging from the heat generated by their attacks and the air filled with dust and debris, making it difficult for any living thing to survive in the vicinity.
In such a fanfiction, they might have an epic battle at first. Saitama's overwhelming strength and Kenshiro's powerful martial arts could clash. Then, they could realize they are both on the side of justice and team up to fight a greater evil, like a powerful alien or a dictator ruling over a post - apocalyptic world.
Well, in a 'Saitama meets Justice League' fanfiction, there could be an epic battle. Saitama's overpowering strength might shock the Justice League members at first. They might initially view him as a threat. For example, Superman, being one of the strongest in the Justice League, could be intrigued by Saitama's ability to defeat foes with a single punch. Batman would probably start devising plans to understand Saitama better and assess if he's truly an ally or a potential danger. The story could also involve Saitama learning about the different powers and ethics of the Justice League, leading to some comical misunderstandings due to his rather straightforward and simple - minded approach to heroism.
It's really hard to say. Saitama has shown that he can defeat any opponent with a single punch. But Kenshiro is also extremely powerful in his own right, with his martial arts skills. However, if we consider Saitama's ability to break any limit, he might be stronger in a direct confrontation.
The pairing of Saitama and Superman could also be really interesting. Both are extremely powerful in their own ways. Superman has his superpowers like flight, heat vision, etc., while Saitama has his one - punch ability. They could have a friendly competition to see who is stronger, or they could team up against a powerful enemy. It would be fascinating to see how they interact given their different personalities and power sets.