Bungie boss Harold Ryan has expressed his disappointment at having to hold back revealing what the studio has been working on.
"For the last several months, we've been building toward a reveal of something exciting that Bungie is working on. We were looking forward to sharing that with our fan community during the week of E3. However, those plans were just changed by our publisher," wrote Ryan on the Bungie website.
"We realise that many of our fans are disappointed by this turn of events; members of the Bungie team share that disappointment."
He made no mention of the reveal being the Halo game Xbox 360 boss Don Mattrick talked about earlier, nor of Microsoft being the "publisher", although we can probably assume it is.
Mattrick, if you remember, said the Halo game was held back from the Microsoft E3 media briefing because the conference was already "loaded" with content.
Harold Ryan went on to promise us a full unveiling "when the right time comes".