Bungie has confirmed that its working on Halo: Reach, due in 2010, in addition to Halo 3: ODST, which has been dated for 22nd September.
People who buy ODST will also get access to the Reach multiplayer beta.
ODSTs new co-operative game mode, Firefight, will be shown off at E3 this week.
Creative director Joe Staten showed a section of New Mombasa set three weeks before Halo 3 during an on-stage demo.
But all eyes will be on Reach, or what there is of it to look at a trailer with talk of an in-station slipspace ruption, winter contingency, Mobile One, Sierra 259 and so on.
Were seeing Halo 3: ODST tomorrow, so well let you know when we know more.