Besides the fact that Necron's original name was Eternal Darkness, that's pretty amazing.

The main differences between Necron and Zeromus begin with the fact that Zeromus came of one man's hatred for human life and was therefore quite malicious. Meanwhile, Necron was a natural aspect of the universe since its birth and was not malicious or evil; it only tried to end all existence because it thought that that was the desire of all living things. The battle with Necron, then, was not fought to destroy it, but to make it understand that the universe still contained a will to live and was not yet ready to end.