Halo 4 updates could introduce clans and Theatre Mode campaign support, according to 343 Industries' Jessica O'Shea.

Writing in the latest Halo bulletin, she said (via OXM): "Theater Mode in Campaign did not make the cut for launch for various reasons of scheduling, rendering issues and some significant engine changes.
"However, we are treating Title Updates very differently for Halo 4 and rather than simply using them as opportunities for simple big fixes, we are thinking of them as a way to sustain and grow features and options, so it is possible you could see Saved Films made available for Campaign (as well as some other significant features) at some time in the not-too-distant future, but that's yet to be determined."

On the subject of clan support, O'Shea said: "As we mentioned before, we plan to continue consistent and meaningful sustainment updates to improve and enhance player experience.

"Social constructs are something we too have missed since Halo 2, and we're looking at interesting ways to improve those experiences in the not-too-distant future. I will be using that expression a lot. Get used to it."

Microsoft has confirmed a Halo 4 release date of November 6. Our Halo 4 review describes 343's debut series entry as "one of the best multiplayer shooters on 360", although we said "Reach has the better Firefight and Halo 3 has the better campaign".