I just got the DC Adventures Heroes and Villains guide, Volume 1, so I've got rather a lot of example characters to play around with!  (The book has about 200+ DC comic characters statted up in it)<br/><br/>One thing about the setting I haven't explained carefully is atomic psychosis; basically, if a person is suddenly exposed to massive amounts of radiation, they tend to get antisocial disorders along with their superpowers.  This is a tend to thing, not a certainty, but it is one of the major causes of supervillainy, and also a major reason why an atomic bomb is an effective and frightening weapon of war.  (rather than a complicated way of handing your enemy a massive number of superheroes)  Atomic Psychosis was first observed in Thomas Edison's assistant Clarence Dally, who went criminally insane after being struck with a massive beam of X-rays in a laboratory accident.  Thomas Edison swore off atomic power from that day, but Dally became the first major atomic villain, the infamous Infernus.  Infernus was a prominent member of the League of Fascists, until he lost control of his powers at the battle of Kursk, and exploded in a massive blast of fire.