Certainly Christianity has built its own theological tradition based on Christian foundational assumptions. That does not mean modern polytheists should consider the field off limits to us. Quite the contrary: if our religions are to grow and thrive, they need a strong theological component. But so far we haven’t produced much in the way of theology.
This needs to change. There have been a few works of Pagan and polytheist theology, but not many, and fewer still that are accessible to ordinary readers.
As of January we have another: Ascendant: Modern Essays on Polytheism and Theology, edited by Michael Hardy and published by Bibliotheca Alexandrina. It’s a collection of short essays by modern polytheists, some well-known and others not. They vary in length and emphasis, but they’re all thought-provoking. And at this point in the polytheist restoration, thought-provoking is what we need most.