I was very pleased with the panel. I knew they couldn't talk about much, but there was actually a lot of things they did confirm for the most part.

The arbiter and Elites will be apart of the new Halo trilogy.

The UNSC will be in Halo 4.

Forge will be apart of Halo 4 and better.

If there is a Mulitplayer Beta it wont be included in the Halo: CEA.

The trilogy will be known as the "Reclaimer trilogy".

There will be old and new weapons in the game (more than likely forrunner weapons) and UNSC weapons will be more evolved.

The music will be slightly different as you can tell from the trailer.

Master chief will have more dialgue.

The game is going to be very open.

Master Chiefs armor in the reveal trailer isn't the final product there will probably be some changes.

The Halo novels "Glass Lands" and "Crytum" will lead up to Halo 4. Cover art is directly from Halo 4 concept art. 

Feel free to add anything I might have missed.  

Yeah the Halofest Panel was awesome, As sweet as Halo 4 is going to be I can't wait for Halo CEA!!! Everything they've shown for it looks amazing

Did anyone think the music sounds a little like Mass Effect? By no means that's a bad thing, but actually kinda neat.

i like what i am hearing about halo 4, cant wait till they can show more about the game.

I can't wait :(. The story is so awsome!

I wished they talked about what engine there using.

Wow that art design trailer is excellent, and the fact that this has officially been named "The Reclaimer Trilogy" pretty much confirms the Forerunners, not to mention much of the artwork reflect Forerunner technology.

Pretty fing awesome and Halo 4 is probably going to be the greatest in the franchise to date.

Yeah, it looks like they want Halo to be fresh again, and if that trailer is anything to go by, I'm hyped!!

Not near enough to get me really excited yet, but enough to peak my curiosity.

Dunno how I feel about so many characters and story elements being brought along for a new trilogy. I was kinda hoping we would move on to fully new relationships and stories and having MC and Cortana be our familiars.