Bungie has said on their official website that there will be huge Halo news next week, to help celebrate their 5th Halo anniversary. Bungie team member Frankie posts:

If you thought there was a lot of Halo information last week, wait ‘till next week. A bunch of stuff is going down to celebrate the 5^th anniversary of a little game we like to call Halo. In November 2001, Halo launched alongside the Xbox console, and the rest is history. Next year, Halo 3 will conclude the story arc begun all those years ago and next week, we’ll take a long lingering look at the series to date. There will also be some pretty BIG surprises and maybe announcements. Who can say?

Could this mean more Halo 3 details? A new Halo bundle? New Halo merchandise? Or perhaps just another PR stunt? We’ll find out next week.

Read (Bungie.net)