Let me guess, they are going to go over Spartan Ops with all its specs and whatever, then add on to how it is a unique addition to the Halo franchise. (Not hating, I actually like it better than Firefight)
Then they will talk about War Games, more specifically, Infinity Slayer. They will discuss the load out options and how you can use different armour abilities based on your preferences, then get ordinance drops, blah blah blah.
This will be on the new build (beta).
So pretty much, it's probably going to be the same shit we have been hearing for the last 3-6 months. The day I hear about a competitive system, is the day I will actually start to give a rats ass.