Actually...
It's new campaign levels (probably)!
Also there's a part in a video showing [SUPCONDITION DATE:] = 1117, pointing to November 17. Though I do beleive January is more probable.
Check out the Halopedia Keep it Clean Page!
http://halo.wikia.com/wiki/Keep_It_Clean
Destroying the world is a lot like eating yoghurt, you use a spoon.
JMO Lord of Spoons
GRAVEMIND
Want to contact me for any reason? My Gamertag is: JMO 137