Well i have a pretty cool idea, How about humans have turned on the gods? So the gods are basically entrapped at Valhalla/Mount Olympus (could be the same place) with like two side the gods are apart of, Eradicate humanity in a brutal war, Or only fight to defend themselves and never leave Valhalla/Mount Olympus. And we could roleplay either as gods, or heroes (aka like Hercules because lets face it, he is not a god)