Dominion

Dallas Freeman was born and bred as a soldier and leader of men, defender of his city. Through guile and good fortune, he kept Dominion City alive following a planet-wide holocaust. But when he asked the public to endure hardships and strict laws to bring them to a better tomorrow, they balked. Then he brought them to another dimension ripe for conquest, but those ingrates didn’t have the stomach for another war. They weren’t willing to do what was necessary. When this world’s super-powered defenders came, the citizens laid down their arms and the traitor A.I. Regina even cooperated to let them in!
But Dominion will show them. Every last one of them. Adversity builds strength. He is a warrior born and bred for glory, and he will take back his city and punish those who wronged him, and teach the inhabitants of this miserable dimension a lesson.
Dominion is a fusion of man and nanotech-based machinery. Although many of his powers focus on Dominion City’s unique environment, he’s still formidable outside of it, and most of his powers are self-sustaining, unlike those of the city’s inhabitants. He’s also intimately acquainted with Dominion City’s systems, and likely to seek opportunities to infiltrate and compromise them.