I have no idea what this could possibly be, but GameInformer is teasing us with "two HUGE exclusive announcements" in the next 24 hours.
Speculations are high that these exclusive announcements could be related to GI twitter Andy McNamara's "year defining things" he's see last week. In that post, he said, "In the last 24 hours I have seen 2 year defining things: one you will see shortly on our cover the other I can't speak of, both awesome."
This would be the cover he is referring to:
Modern Warfare 2, huh? That's a big hint already, actually. Unless of course... he was actually referring to the six-page report on DJ Hero. We'll find out soon enough, anyway. Time's a ticking and we're well into that "next 24 hours". We'll keep you posted on this.