The Star creature lived at the very center of an enormous black hole on an asteroid planet.
The creature was almost infinitely powerful. It had the ability to absorb the energy of stars. Every time a solar system would get consumed by the black hole, the Star creature would absorb the energy of the entire solar system, becoming that much more powerful.
The black hole once swallowed up the Earth, but Superman, Batman and Samurai stop the Star creature from absorbing the Earth, and using his super strength, he pushes the Earth out of the black hole and back into its' natural orbit around the Sun.