Is this the 2013 Mercedes-Benz GL Class AMG? Maybe.
In fact, the same front end, right down to the big mesh grille, was shown on the official images released Wednesday--on a vehicle badged as a GL350 BlueTEC--as well as on the vehicles on the show floor. Mercedes lists 21-inch twin-five-spoke AMG wheels as an available upgrade for all GL Class models (also shown in the released images of non-AMG GL Class models), too.
Sorry to burst your bubble, but it doesn't look like Mercedes-Benz was foolish enough to put images of an unannounced GL Class AMG on the future vehicles section of their retail website--though they may still have a rogue dealer making Hungarian history and unofficial AMG announcements down in New Orleans.