I'm not sure if anyone has pointed this out but the glider on the main menu looks like the glider from the skydiving game in Wii sports resorts. In other words we're
Wii Sports Resort: Air Sports - LearningWorks for Kids
Go Vacation Review | Trusted Reviews
Skydiving - Wii Sports Resort Guide - IGN
going pro in every wii sports resort sport - skydiving - YouTube