If the go to Egypt then the next big bad should be Set: the ancient Egyptian God of Chaos, War, Death, Darkness, Storms, Deserts and Foreigners.
What if Set conspired with Zeus and Odin as business associates sharing ideas and power. But Set secretly planned to kill of the two king of the gods by putting a plan in motion to create the ultimate weapon: Kratos. Armed with the Blades of Chaos, Kratos has destroyed two patheons. Set conquers Greece and Italy and plans to move north the Norselands. That where the next games starts - during and invasion.
