...hazam can both put up a good fight and maybe win if superman isn't overpowered by some outside force. I do see Flash beating him and firstorm. He could literally turn any form of radiation into any other form. He could turn solar energy into red sun radiation or every solid material in the near by area into kryptonite. I see firstorm as one of the strongest DC characters because essentially he can change anything around him, even the air his opponent is breathing into a weapon to his advantage.