(It seems that) In the developmental history of Men, there were three broad phases of how the ultimate deity was regarded: Orinially God as Mother; then - for most of recorded history - as Father; and - now and in the in future - Parents.
Hunter Gatherers seem to regard 'God' as (or, since it is not fully conscious or articulated, as if) a nurturing Mother; who provides all that is needed; and gives birth to all Beings. This goes with a passive and responsive attitude to the world - God as everywhere and Men as children.
Agricultural societies (and traditional sedentary societies - from at least Ancient Egypt until the Industrial Revolution in the West) generally have a masculine concept of God, or the supreme god; and this especially applies to monotheisms. This was the case for the early centuries of Christianity, and until the past several generations.This goes with a Kingly image of God, with religion as rituals and laws; and Men as subjects.
From the period of modernity (and especially since about 1800) I believe that the understanding of God is destined (supposed) to be as Heavenly Parents - Mother and Father in a celestial marriage, as a distinct but inseparable dyad - a polarity. This is - I think - the proper future and correct understanding of God: as Heavenly Parents.
This is explicit and officially sanctioned in the Restored Gospel of Mormonism, although in practice - so far - Mormonism has been as much (or more) Patriarchal as mainstream Christianity; and there is very little reference to Heavenly Mother or to the dyadic nature of God.
However, my interpretation of this, is that it is a temporary and merely-expedient distortion caused by the rise to dominance of materialist-leftist and socio-political feminism; which (as a strategy) tries to subvert the assumed male nature of real-God and replace it with an insincere female image of not-really-God (i.e. 'liberal Christianity' in its various forms).
Another distortion is the (only semi-serious, not truly lived-by) idea of restoring tribal ideas of God as Earth Mother - a pantheistic idea of non-purposive Goddess divinity; which owes much to an eclectic partial-assimilation of Hinduism and Buddhism. As well as being undesirable (an attempt to become spiritually children again); this is impossible due to the large changes in human and societal evolution: it just will not happen.
Another distortion is the abstraction of God. Instead of regarding God as an incarnate person (of whom the resurrected Jesus was the filial image); the process began soon after the ascension of regarding the sex and personhood of God as childish anthropomorphism.
So we get the idea that God is not really either male or female, but both-or-neither. This leads to a sexless abstraction of God's person. And leads to the idea that the sex of mortal Men is just a temporary aspect of mortal life (just as mainstream Christians usually regard marriage as merely an expedient of mortal life, dissolved at death and without any equivalent in Heaven) - and that after death we will move-on to becoming de facto sexless.
(I regard this tendency to abstraction, sexlessness and not-incarnation of God, as the deep reason why mainstream Christians have found themselves unable coherently to defend real marriage against the mind-warping yet officially-mandatory literal-insanity that is SSM and the trans-agenda - and whatever is planned to come next...)
Anyway, to pull the argument together; my contention is that the truth and future of Christianity is to regard God as a dyad of Heavenly Parents - and to regard the sexes - man and woman - as ultimate, metaphysical realities, which underpin all of creation from eternity.