3/2/12
Today, a recruitment video went up for 343. In this video, you are able to hear the first mix of a song from the game and be able to see Halo 4 on some of the screens:

As the game is being developed by ex-Retro employees, it's no surprise that the HUD looks very similar to Samus' in Metroid Prime. Also, I'm glad that the music has a new feel but you can still tell that it's Halo.
I will continue to update this post as new information arises.