And here we have what looks like the box art for Halo 4, as assembled by NeoGAFer spawn031. An email from Microsoft went out with fragments of this image, titled "Your piece of the Halo 4 puzzle." Each email came with a bit of this image, which spawn031 assembled and monsterfracas shared.
Hey, now. That is some cool-ass box art.
Halo 4 Box Art [NeoGAF -- Thanks Andrew!]