One main theme could be hope. Superman often represents hope in the DC universe. Another might be self - discovery as he navigates his powers and role in the world.
Well, in the bat man vs superman story, it depends on the context. If we consider a fight in Metropolis where Superman has all his powers and no kryptonite around, Superman is going to be very difficult to beat. He can zip around the city, dodge Batman's attacks, and use his super strength to overpower Batman. But if Batman manages to get his hands on kryptonite, like he did in some versions of the story, then the tables can turn. Batman is a master strategist, and with kryptonite, he could potentially incapacitate Superman. However, overall, Superman has the natural advantage due to his superhuman abilities.
One of the main conflicts is ideological. Batman sees Superman as a potential threat to humanity because of his god - like powers. Superman, on the other hand, is just trying to do good but his actions sometimes have unintended consequences that Batman doesn't trust. Another conflict is personal. Batman has his own set of rules and morals, and he feels that Superman's existence challenges those. And of course, there's the physical conflict when they actually come to blows.
One idea could be a battle in an alternate dimension where the laws of physics are different. This would force both Superman and Omni - Man to adapt their fighting styles. Another could be a scenario where they are forced to team up against a greater threat first, before their own conflict resurfaces.
It's hard to say for sure. Omni - Man has incredible strength and combat experience. However, Superman has near - invulnerability and his powers are powered by the sun. If the fight takes place on Earth, Superman has the home - field advantage with the sun constantly recharging him. But if it's a long - drawn - out battle, Omni - Man's tenacity could also be a factor. In my opinion, Superman's powers are more diverse and powerful, so he would likely come out on top.
Batman vs Superman's story involves a complex web of events. There's public pressure, personal vendettas, and a looming threat that forces them to either work together or destroy each other. It's a battle of wills and powers.