These images have been making the rounds, and apparently Microsoft has launched an investigation into where these images have come from.
Lending legitimacy to all of this is a Microsoft spokesperson told Game Informer they were working with law enforcement and Microsoft corporate security to "address the situation." Asked if the game had in fact leaked early, the spokesman did not reply.
On top of all of this is, Microsoft has been yanking down Halo 4 footage from YouTube all morning. What do you guys think of all of this? Let us know on Twitter.s