The Halo 4 Warthog will debut in Forza 4, but you can't drive it

One of the biggest surprises of this weekend's Halofest celebration of all things Halo here in Seattle is the news that Halo 4's Warthog will make its interactive debut this year, in a non-Halo game. » 8/26/11 4:20pm 8/26/11 4:20pm