There may already be posts about this but, the official Xbox UK Facebook page has revealed that there is going to be a Halo 4 live action trailer debuted during half time. This will likely be between 17:45 and 18:15(BST/GMT+1) and shown on ITV1 however, this channel may be differ in other countries.
It will likely only be 30 seconds long but here’s the image they’ve given us to quench your thirst until then 
