Is polytheism philosophically possible?
Any and all such theological claims are strictly in the realm of speculation. There is no way to prove them, no evidence to support them, and no reason to give them any credence. As such, there is not much that philosophy can say about such matters. Polytheism, monotheism, and pantheism all amount to a bunch of hand-waving. And because they are completely unprovable and unverifiable, they are useless as guides to truth. If it is indeed truth you seek, theology is a broken compass that will send you off in a random direction.