I believe the comments were along the lines of it being planned as a platform for Halo for the next decade. So in that sense, yes sure it could. New story campaigns become part of the "platform", as does the BR mode, etc. It basically becomes like the MCC, but for new Halo.
Do I think it literally goes a full 10 years of active content updates? Not unless it rebounds and becomes mega-popular. It's exceedingly rare for any MP game to get new stuff for an entire decade, let alone one with the post-release incompetence of Infinite.
The longer it takes to turn the ship around, the more likely I think it becomes that they cut bait way earlier than 10 years and simply work on a new full game. A new title will always refresh expectations and excitement levels in a way expansions will not. However they also don't want to leave Infinite in a place where basically no one has any faith in the studio moving forward from it. If they can't turn it around, my HOPE is that we will see managerial upheaval at the top of the studio.
If the fabled CA BR mode exists, right now my guess is that you're going to see 343 try to use it as a soft relaunch of sorts for the game. Forge should be done and in the game by then, and they will also I hope to the sweet baby jesus be on a reasonable cadence for new MP content instead of this six month shit. So they'll try to push this BR mode as a reason to come back to the game, put a new marketing push behind it, and hope having a complete product with a content pipeline that isn't garbage anymore manages to retain players who left the first time.
I wish the devs themselves luck, because the sad reality is that the game was fundamentally fun. That fun was just surrounded by an ocean of incompetence and greed from people who WEREN'T devs..
