According to CVG, Microsoft's set to make a very "special" Halo Reach announcement on Thursday. The special event is invite-only and held somewhere in London, apparently The Gadget Show's Jason Bradbury as well as Rio Ferdinand will be present.
Why Ferdinand? You guess is as good as ours.
Halo Reach is set for a September 14 release exclusively on Microsoft's Xbox 360, obviously. What exactly will the announcement be? Who knows, maybe the Spartans will get to wear lovely football/soccer jerseys whilst battering in the heads of the Covenant.