Systematic Theology as anti-polytheistic tract

Reading Pannenberg’s laborious treatment of the natural theology and religio got me wondering, in response to something Pannenberg said:  modern treatments of religion treat the gods of different communities as if they are all the same.  But this will not work.  If two gods clash, who is mightier?  Liberal Protestantism simply said the gods were a projection of their worshipers.  This is probably true but it misses a larger point:  the identity of God and gods arises from a faith’s narrative (read canon, covenant document).

So I started thinking, what if systematic theology, when focusing on the doctrine of God, dealt more with a narratival thrust as an attack on polytheism rather than the author shadow-boxing dead German scholars?