So, the theory has been going around the community which notes the similarities between the Halo games, and the Four Horsemen of the apocalypse bible story.
Halo CE = Conquest (to own the Halo ring)
Halo 2 = War (Battle of Earth begins)
Halo 3 = Famine (The flood comes to Earth. Flood causes famine)
Halo 4 = Death (of Cortana)
But after thinking things over in my head, I have a bit more to add to the theory so I figured I’d post it here.
We all know that Bungie loved the number 7 - but was there more to it than that? In the bible story, there are seven seals scattered across the world, and it is said that if all seven seals are to be broken, then the walls between Heaven and Hell shall be opened and a fight shall break out between three kingdoms, leading to the ultimate destruction of the world. The three kingdoms can, in my opinion, be translated into the Halo story as this:
The first kingdom is the kingdom of Man which, obviously, is represented by mankind. They have no reason to fight beside the fact that the war is being fought in their own kingdom - they fight for survival
The kingdom of Heaven (or Angels) is represented by the Covenant. They are a heavily religious group and their reason for fighting is that they believe it is the will of the gods.
The kingdom of Hell (or Demons) is represented by the Flood. Their ultimate goal is to destroy everything that is not their own. They fight for dominance.
For this reason, I feel it to be far more than just a coincidence that there are Seven Halo rings. The rings are representative of the seven seals, and once broken (or in this case, activated) they bring forth the destruction of everything.
If Halo 5 really is going to be representative of the apocalypse, then I feel like we might just see the Halo array fire.