here’s a link, not sure if its been posted, pretty funny and informative in some ways:
is this really gonna be in the game?
probly an easter egg 
It better be.
or possible audio for the iwhbyd skull, if there is one?
They’ll probably be an easter egg just like the Roosterteeth guys in Halo 3.
It will be, it’s been confirmed.
http://www.g4tv.com/thefeed/blog/post/722931/conan-obrien-in-halo-4-coco-and-andy-richter-confirmed-as-voice-actors/