Bungie may have been gagged by their publisher, but that certainly hasn't kept them from beating around the bush. Harold Ryan was obviously pissed by the move so it only makes sense that he try to stretch the leash as long as possible. In a recent release on the official website the company states, "At the moment we do have three distinct projects underway within Bungie - some familiar, some not. Some on a closer horizon, some quite far off".
Take special note of the part highlighted in bold, it doesn't take a rocket scientist to figure out as even my mother knows Halo is Bungie's prize child. So that effectively puts one finger down, next is the superintendent project, and the last is anyone's guess. Knowing them however, we will get wind of more information soon enough. Whether it be from the horses mouth or a cryptic hobby site.
Along with news of new titles, Bungie has also confirmed some content coming out for Halo 3. Nothing huge, but it will be debuted at the Penny Arcade Expo.
Subject: Bungie working on 3 new titles plus Halo 3 stuff 
Fri Aug 01, 2008 4:03 pm