Vicariousgames
Master Chief is all set to return in 2012 placing him in the position of a brand new trilogy, while it may have been announced at this years E3, the game has been in development for a significant amount of time.
Nate Walpole who has been working with 343 Industries since 2008, put up this showreel showcasing a per-visualization concept from a game which he was working on (which could be Halo 4). Since he does not allow embedding videos, we suggest you go visit his video page to take a glimpse at the awesome animations he put into the reel.
Now if we look at this reel, the assets clearly show us that it is from a Halo game. What it looks to us is that this may be either a snippet from a pre-production concept of Halo 4 or another game which was set in the Halo universe
