- last post: 01.01.0001 12:00 AM PDT
This is my speculation. If you remember from the first game, 343 GS stated that the Flood would be wiped out when Halo was activated. Then, he mentioned that when the others follow suit, the threat would be gone.
Now, others would mean more than one more, so obviously they arre scattered all over the universe.
Now since the Covenant have found Earth, my thesis is that they have discovered a relationship between how the first Halo was located and earth. Possibly, earth is the center in a sphere of Halos that, in order to wipe all life from the galaxy, project one of the beams that we saw during the game. They would come together when fired in unison, and have s death star like beam. Then, they would all fire towards Earth, which would then absorb the energy. Once all the beams hit Earth, a speciial device buried deep in the earth (presumably under Africa) would focus energy, and then release out in pulses, each one going farther and farther out, like our radio broadcasts do. The pulses of energy would then sterilize the entire galaxy after many thousands of years as the pulses extend. Maybe the other Halos come into play in this game because they started their beam sequence, and they are going to fire to Earth. The covies found out, and now are coming to earth to try to shutdown the whole operation. Self preservation is the motivation, obviously.
Theory 2:All hell has broken loose, and everything in the galaxy has no relaiion to each other, everyone is doomed. (a cheap one, i know.)