Alright I am going to speak about something for Halo 3 - note this is all speculation and I have no basis for this other then my own imagination. Halo 3 will begin with the Master Chief fighting for Earth on a Covenant space ship. The spaceship will have the Prophet of Truth on it cause, as we know, he boarded the transport ship at the end of Halo 2. Now I think upon killing the Prophet of Truth both sides will take a reprieve as the Covenant regroups and looks for new leadership, the new leader: the Arbiter. Meanwhile, the Arbiters search for the Ark will lead him to Earth which I am thinking is the Ark. That would of course make humanity decesndants of the surving Forerunners, interesting eh. Now while on the Ark, Cortona will somehow make contact with the Chief and inform him that the Flood is spreading and suggest activating the Rings. In order to perserve all life in the galaxy the Humans and Covenant will fight together against the Flood to try and stop it. Many will die as they go after the life of Gravemind and end in an epic battle which will again destroy another Ring, and Gravemind along with it, thus ending the Flood infection, for now. Your thoughts please.