Something that struck me about this is how strongly Johns broadcasts it in his JSA run. It could likely fill a very long post in itself, and is kind of creepy.

Then again, character development in comics never working is a long-standing fact. It's still fricking annoying when YOUR GENES ARE EVIL is suddenly slapped in the face of a character who has NEVER shown any bad guy tendencies before.

I'm looking at you, Johns writing Atom-Smasher.