Mort from (future) Motown

The Hate-Monger was an occasional enemy of the Fantastic Four and other Marvel super heroes who utilized his "hate-ray" to turn heroes against one another. After his first defeat, Hate Monger was unmasked and revealed to be Adolf Hitler, who had in actuality survived World War II. Arnim Zola, one of Hitler's chief scientists in the Marvel universe, once created a machine to allow Hitler to transfer his consciousness into new bodies, thus granting the German dictator immortality in a sense, but the machine was subsequently destroyed, and das fuhrer is apparently gone for good.

I decided to jump over to the DC side of things for this week's mort. Despite the picture, he is actually one of the future's great heroes. Who is he?