Green and Blue, probably meaning Chief and Cortana, anyway I just listned to the itunes preview and it sounds great!
It has a real feeling that some big shizzle just went down, and this is the aftermath. Kind of like how Spark floats down at the end of Halo 2, or when the Pheonix flies under the lake at the end of X2.
Not to mention that the rest of the album is 100% Amaze-ballz!
Great Job Mr Davidge.