Those expect ting even Forza 5 sales from the new Forza will be disappointed I think. Forza (and realistic and futuristic racers in general) make good launch titles for filling that "showpiece" slot. Not only can they be made relatively easily made, they are also easy to make look very good and show off. As such they are the type of game to do well at launch. But Forza has been overused so much that now, without that advantage, it can't grab the attention needed to sell. As a launch title, it was the high-quality show piece. Now, it's drowned out by other Xbox exclusives, competing companies' exclusives, and multiplats.