Superman and Lois Lane's son, lost his powers before his birth while still in the womb thanks to exposure to golden kryptonite. They felt they had to train his younger sister Lara to keep her powers a secret from Joe so he wouldn't be jealous. But Lex Luthor told Joe about this lies and gave him an experimental serum that gave powers of his own. He managed to kill his sister before dying from serum the effects.
Joe Kent would have had half of the powers of a Kryptonian (Superhuman strength, speed, flight, invulnerability, x-ray vision, heat vision, super-hearing, super-sight) due to half DNA coming the human mother.