The king of olympus

Perseus, the eldest son of Kronos and Rhea was once the King of Olympus. When his younger siblings overthrew him, they completely destroyed him. Unbeknownst to them the Olympians sealed their fate, as he was the only one who could stand against the rising Protogenoi and save the gods from utter destruction. Miraculously he returns, will the dead king save them or leave them to fate