Action Comics #31 (DOOMED)

The SUPERMAN: DOOMED epic continues! Superman barely survived his battle with Doomsday and now realizes that his wounds are not healing. Not only that, but he's suffering disturbing physical and emotional side effects. He is changing...and the newly enlisted Men of S.T.E.E.L. - Metallo, Ghost Soldier, Atomic Skull and Steel - are about to find out into what!