Aparently I missed the part where charum hakour was destroyed, I thought that at the end of halo 1, didact/bornstellar re imprisoned the didact, and then it told him what it is, but maybe I read it wrong.
Anyway, it is still an absolute fact that you will go to a shield world, and you will uncover the cryptums of bornsteller, and glory. Your main opponent will be a highly evolved form of flood created by the timeless one who is your opponent boss guy. There will also have been a few brute ships who found themselves in the same predicament as chiefs ship, and about in the middle of the game, you will suddenly be attacked by covies and it will be as terrifying as when you suddenly encountered the flood in halo one.
This is simply the truth it is a fact. I am right if you dissagree with me you are wrong! any questions?
[Edited on 07.15.2011 7:15 AM PDT]