It is a well know fact that the bad ass Kratos does actually have a brother. But in the new trailer more information is revealed about Kratos’s family. He actually had a mother too (well obviously) and a brother named Deimos. Interestingly Kratos will kill his brother too, judging by the trailer above.
We will see whether the two will have any sibling rivalry when Ghost of Sparta lands in our hands. Stay tuned.