Ok, I am done with my own research. Raven was a member of the cult of Azar, but started moving against them very early in getting the Titans together against their will as they were pacifists, obviously she eventually gave up pacifism the central tenet of their belief system all together.
In terms of the Gods of Light and Dark. There are some implications they might be similar to the Olympian Gods (or the New Gods like Darkseid), but nothing definitive.