Oooh I have a some of these backlogged for any occasion.
-King Tut [http://en.wikipedia.org/wiki/King_Tut_(Batman)] a College Professor who suffers from amnesia and believes he is an Egyptian Pharaoh... and evil.
-The Bookworm, equipped with the powers of speed reading...
FOR EVIL!
And no, he isn't really a Supervillan, but he's not much of a hero either, yes, the magnificent, the amazing...
Dog Welder!!!!
You heard me. His superpower is the ability to weld dogs. To people faces.
Read about his and his teams exploits here. [http://en.wikipedia.org/wiki/Section_8_(comics)]