Microsoft has revealed that gamers will be able to get an advanced taste of Halo 4 by picking up a copy of Forza 4 in just a few months time.
Although you won't be able to drive it, Halo 4's warthog will be appearing in Forza 4's Autovista mode. This will allow people with Kinect to look around the vehicle and interact with it.
According to Microsoft, it will be an Easter egg that's rather difficult to find, although walkthroughs will surely appear once people do find it. Cortana is also said to give you an overview of the vehicle while you're viewing it.
Forza 4 is planned for release on the 11th of October, exclusively on Xbox 360.