Greed was talking about Overlord Superman. One of his skills was summoning the sun. Greed was certain that when this code had been written, the programmer could not possibly have created a yellow sun from scratch. They had simply shrunk the sun of the Solar System many times over and handed it to Overlord Superman.
Not creating one from scratch was not entirely due to laziness. Mainly, Kryptonians had been created by God, and the code that made them stronger under a yellow sun had been written by God, with no notes attached. The administrators of Battleworld, Lucifer included, probably could not make heads or tails of it.
If they created a yellow sun from scratch and got the frequency wrong or something, making it unable to trigger a Kryptonian's abilities, wouldn't the skill be useless? So they might as well make an exact copy of the sun. If the code ran, don't touch it.
And the spaceship they had fashioned from blueprints downloaded from the Web, meant to serve as background scenery, happened to be powered by stellar energy. Overlord Superman directly summoned a tiny star inside it—how could its power possibly fail to fill up?
While Overlord Superman was fighting monsters, he had first fully charged the ship. Greed then brought up the security system and restarted the ship's engines, successfully getting this spaceship—which should never have been able to fly—to take off. Bruce was the only unlucky one.
That's right, one moment he had bat wings, the next angel wings, but he actually couldn't fly. That's how tactical board games worked. Growing wings did not necessarily mean you could fly; skins did not add combat power.
But that was probably for balance. After all, nearly all his skills were area attacks, and he could switch forms back