A toxic combination of rage and utter nihilism, Cyborg Superman is Superman with all of Clark Kent's power and absolutely none of his humanity. He was willing to see universe enslaved by the Anti-Monitor simply so that his wish for death could be granted and before then, he tried to wipe out all of humanity in order to craft the Earth into a massive spaceship under his command.
The New 52 version in the form of Zor-El seems to be just as evil as his predecessor: