Kratos' brother, Deimos
The teaser you are about to see was spotted by the guys at PlayStationGang, and it’s actually grainy and the sound is somewhat distorted. The quality of the voice acting and the God of War IV logo displayed at the end is a little suspicious so we’d take this with a grain of salt.
However, the teaser opens with a voice can then be heard trying to awaken someone. Watch it below:
“Brother, the phoenix has-been drinking your blood, full of your anger, your strength, and during her rebirth she also has let you in life. Now I ask you: what are you going to do? Would you leave me here in hell? wake up, wake up!” says the voice.
The voice suggests the speaker is Deimos, the ill-fated brother of Kratos. Deimos was taken by Ares as a child after hearing a prophecy about the destruction of Olympus at the hands of a ‘Marked Warrior’, believing him to be the child of prophecy the gods confined him to the Domain of Death.
Evidence of God of War 4 being in development is rumored a lot as it appeared in number of CVs, composers profiles, and listed by some retailers.
[via CVG]