We all knew it would happen, but GM made it official today, announcing that the all-new Pontiac G8 sedan will debut at the Chicago Auto Show next week. The announcement was prompted by an ABC News special that aired last night in which GM’s Rick Wagoner showed off the front end of the new G8 to Charlie Gibson. As we told you before, the new G8 is based on the also-new Holden Commodore sedan that GM produces in Australia. It will be rear-wheel drive, with an optional V-8 engine of some type, we’re sure. Photo Courtesy of Jalopnik