Nah, though the focus will clearly be on Oni in months to come. Bungie's Nathan Bitner points out that we need to be careful quoting Bungie employees :

Please be careful when quoting or misquoting Bungie employees. This occurred last week as well when Alan Stott talked about a release date given to him by a Bungie employee, when in fact no such thing occurred, no email could be produced, and I was then told by Alan that the email was from over 6 months ago.

He goes on to clarify the current sitation a bit. Don't worry--Halo isn't going to fade to black over the next few months, but we may have to tighten our belts a bit.