It's about time!
I'm thinking we'll get a new trailer and members of the press may be able to get hands on with the game or at the very least, treated to a demonstration of some sorts.
I'd be lying if I said i didn't have huge expectations for this. Microsoft have put a lot of effort into building a pretty strong team to take over the reigns which is good to hear, but i think there is a huge amount of potential in terms of gameplay. Chief and Cortana potentially 'alone' on a foreign planet and quite possibly for the first time without the aid of Marines, Elites, etc. It'll be interesting to see if they can nail that sense of fear and isolation so to speak. Even looking forward to the story as well. They've made mentioned of us maybe experiencing Cortana's transition into rampancy.
That should make for a pretty cool story angle as well as seeing how it affects the Chief. I wouldn't mind if Chief had some of the Reach abilities as like 'standard'. Maybe at the very least the ability to sprint.