Halo 4 information gathered up from frank o'conor interviews http://m.youtube.com/index?desktop_uri=%2F&gl=CA#/watch?v=ICDnykh71PM . Notice at the beginning he says ai's are like a voice of god guide and narator. He also says theirs is a ai named bb in glasslands and we will be hearing more about him in halo4. Also it says that they are not done with the covnent and we will be hearing more about there story in halo 5 possibly. Grave minds are minds that form when enough flood mass gets together. He says that 1 of the noble team could have of survived possibly jun because in reach it did not show him die maybe he could be in halo 4 hostage on the planet. Says chief is one of the last remaining spartain 2s.
If anyone was wondering about the so called jet pack in the halo 4 trailer, it is not a jet pack it is a 0 gravity pack said frank o'conor. So that means that there might not be any armor abilities we will have to wait and see some gameplay?