Ethan is a hero from another dimension that was pulled into the Wildstorm universe and is reborn as a small child. Dr Tsung and his family adopt and raise Ethan. Dr Tsung learned that Ethan had special abilities, and used this in his work with IO and Miles Craven.
Ethan draws his powers from many parallel dimensions through a nexus in his genetic structure. This allows him to mimic any Gen-Active power that could possibly exist.
Nothing is known of Ethan after the Fire From Heaven story. He was one of the SPBs freed from TAO's cryogenic prisons prior to Armageddon.