MS slipped up and put these images online confirming the rumor of a Halo 4 console. The stats are what you would come to expect from an expensive bundle:
1 - Halo 4 console (320GB HDD)
2 - Halo 4 controllers
1 - Halo 4 game
1 - xbox wired headset
It does look realllllllllllllllllllllllllllllllllllllllllllllllllllllllllyyyyyyyyyyyyyyyy nice!
the link to the actual microsoft store listing has since been taken down.