Unlike a lot of people, I play Halo for the single player campaign. So everything I seen/read so far looks amazing. My question is will the flood and Gravemind return? I know that the Covenant has been confirmed to play a role, so I was wondering if the Flood had been confirmed. I know you destroy a large portion, include the Gravemind of the first trilogy, with the destruction of the Ark and Installation 04B. Just wondering.