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
Skydiving - Wii Sports Resort Guide - IGN
Development:Wii Sports Resort - The Cutting Room Floor
Skydiving - Wii Sports Resort Guide - IGN
Wii Sports Resort - Skydiving - YouTube
going pro in every wii sports resort sport - skydiving - YouTube