For us screenshot takers, will we be able to watch our games from the halo CE anniversary campaign and be able to take screenshots and upload them to our file shares? 
Please leave a comment!
-Shadierliam
Nope, this feature won’t be enabled for the CE campaign. The only theater mode you can access through is the Reach Theater Mode, which can be played through the same disc. This feature will not allow you to take pictures or video clips from the CE campaign.
Sorry but no.
Anniversary’s Theater will only be available for the Reach’s modes (Matchmaking, Forge, Customs and Firefight).