[quote=@Dead Cruiser]
[@Divine Darkness] That's the second time I've heard that comparison. Can't say I'm especially familiar with the character.
[/quote]
Even though his origin is more in depth as are his powers, Captain Atom is basically a human turned energy being in a suit. Here's his edited appearances in the [url=https://www.youtube.com/watch?v=JVr-QvTBTAE]Justice League Unlimited[/url] cartoon. Towards the beginning you'll see what happens when his suit is breached and towards the end he goes toe-to-toe with Superman.