system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] So, Owlman is an evil Batman basically. But, why did he turn to crime where Batman turned to crimefighting? Same for all the other evil versions, like Ultraman vs Superman etc.

Is there any difference in their backstories? Is it ever explained why any of them became evil where their mainline counterparts are a force for good...
gpt
Owlman is not Bruce Wayne from a different universe. He's Thomas Wayne Jr., Bruce's older brother from a different universe. Thomas Jr. was always power hungry, greedy, and evil from the start, and his greed only grew when he started to think his parents were managing the family's fortune poorly. He killed his own parents in order to take over running the family business. He also tried to get Bruce to help, but Bruce refused, so Thomas Jr. killed him too. 

Ultraman was born on Krypton, but that's about where his similarities with Superman end. Like Owlman, he was born in violence and rage. He only stayed with the Kents on Earth for a few years (his Kents were not the kindly farmers of Superman's life, either) before he killed them and went on his maniacal spree to cause havoc. Also unlike Superman, Ultraman gains power from Kryptonite, so his goals largely involve hoarding it. 

Super-Woman is not Diana from Themyscira, but another Amazonian who rebelled against her people's doctrine to stay out of man's world. She enjoys the literal power she has over 99% of Earth's population, and uses things like her lasso of submission to enslave people. For her, it's largely a big fun game where she can be as sadistic as she wants, and there are only a handful of people that can stop her. Fortunately, she is on their side.