As I read the Blackest Night story arc, I notice several themes that play an importnat part in both the Blackest Night story and in Christianity. One of the first pair of themes to jump out to me is that of Creation and Fall.
We pick up with a creation story after the Indigo Tribe makes its presence known to Hal Jordan:
Indigo-1: In the beginning? In the beginning the universe belonged to darkness–and then there was light. For seven hundred years, the universe was nothing but blinding white light. Then the darkness fought back and the white light was splintered. Every sentient being born from the light now contributes to its emotional spectrum. 
Now compare that with the creation story in Genesis 1:
When God began to create the heavens and the earth—the earth was without shape or form, it was dark over the deep sea, and God’s wind swept over the waters—God said, “Let there be light.” And so light appeared. God saw how good the light was. God separated the light from the darkness. God named the light Day and the darkness Night. There was evening and there was morning: the first day. 
The obviously similarities are there. In the beginning is darkness and then there is light. But that is where the similarities end. In the story told by Indigo-1, the white light splinters and from that splintering comes creation: sentient beings and the emotional spectrum from which the different Lantern Corps draw their power. In the Genesis story, the light is not the creator, but part of creation and God, the Creator, is there from the beginning, unlike the white light from Indigo-1’s story.
Another difference is that in the creation story from Blackest Night the creation is brought about by the darkness fighting against the white light, causing the white light to splinter. Whereas, the dark in the Genesis creation story exists alongside of the Creator, but the dark is still subject to the Creator.
Dietrich Bonhoeffer writes regarding this:
The dark deep—that is the first sound of the power of darkness, of the passon of Jesus Christ. The darkness, the tehōm, the tihāmat, the Babylonian “primeval sea [Urmeer],” contains within itself—power and depth. This power and force still serve to honor the Creator now, but once torn away from the origin, from the beginning, they become tumult and rebellion…
It is a moment [Augenblick] in God in which the unformed mass and its Creator exist over against each other. It is a moment of which it is said that the spirt of God hovered over the waters; it is a moment in which God is thinking, planning, and bringing forth form…God remains utterly Creator over the deep, above the waters. 
In Indigo-1’s story, catch a glimpse of the Fall, the blackness fighting against the white light and giving birth to the emotional spectrum. Contrast this with what Bonhoeffer said; originally the dark, power and force, serve to honor God, but in the Fall, they become something different and twisted.
Feel free to share your thoughts!