"God Of War. Other story I: Risen from the Dead"

After killing the gods, and after Kratos pierced himself with the sword of Olympus, he wakes up in another place, while still in Olympus, he realizes that he was brought back to life, but who? When Kratos wakes up, he realizes that he is still in Olympus, but in another Olympus, where all the gods are alive and not evil. Where is he now? Who brought him back to life? What kind of Olympus is this, where everything is fine?