The Deadly Double — David Seidman

After chasing the evil MALA through space, SUPERMAN returns to Earth, and he finds people running from him. While MALA had decoyed SUPERMAN, her partner, JAX-UR, disguised himself as SUPERMAN and terrorized the world. Now JAX-UR and MALA plan to save the people of Earth from SUPERMAN, become their new hero, and lead them in JAX-UR'S quest to take over the planet. SUPERMAN has to stop JAX-UR and MALA, but it's not easy when they have a whole world on their side.