In any discussion of religion and fiction (perhaps especially comic book fiction) there is naturally an attraction to mysticism and metaphysics over some rationalist perspective. Not that the free thinkers never get a look in, just that the fantasy world of comics thrives on the magical and mysterious.
This could lead into a discussion on Romanticism, only I want to hold that over till we get talking about literature and the way that literary movements and literary criticism impact on the graphic medium. So instead, let me remark that the mystic traditions of Christianity such as the Rosicrucians and the Knights Templar; and Judaism, in the form of the Kabbalah, run as a very interesting undercurrent to comics mythology. And the freemasons will always be good for a spot of intrigue.
If you want, you can pile in the Illuminati and Club of Rome.
Just as our legends bear the ring of truth in all the hyperbole, so too do comics serve a dramatic need by drawing directly on a real sense of the unknown and the yet to be discovered. Their exaggerated stance illuminating something buried within us.