Complex sentence: The gods Hades and Poseidon appear in flashbacks of the Great War, there is Deimos who is the brother of Kratos and Kratos is on his way to find him; and in the final cutscene alongside Zeus and Hermes on Olympus.
Split into simpler sentences: The gods Hades and Poseidon appear in flashbacks of the Great War. There is Deimos who is the brother of Kratos and Kratos is on his way to find him; and in the final cutscene alongside Zeus and Hermes on Olympus.