Wii Sports bowling is stupidly popular. Everybody loves playing it. There is a market for a good bowling game on the Wii where you actually mimic bowling motion instead of using a controller. The problem is that nobody has actually made a good bowling game yet. You have to make the ball motion, pin physics, etc. fairly realistic, but also make it easy enough to halfway repeat shots so that it's at least fun. And you have to have gameplay elements that are actually fun. Gameplay needs to be quick and interesting (unlike that annoying Brunswick game on the Wii where you have to wait on every single shot by the AI, career mode is painfully slow and drawn out). Also, a quality bowling game in my opinion should have a career mode that involves actual PBA bowlers, but also should have lots of other game modes, including mini games, and above all it needs a good multiplayer mode for all of these game modes. Now, what does all this remind you of? Yep, the Tiger Woods games. Those took a difficult sport and made it accessible to everybody, from the casual gamers to the hardcore PGA fans. And they do sell pretty darn well.