See The Original Sketches For LeBron's Nike Air Zoom Generation
Narratives abound in the sketches of the prototypes. Five-pointed crown logos and groups of five stiches on early drafts allude to a time when LeBron was meant to wear a corresponding number. And later, slender designs give way to boxier imaginings of a shoe inspired by LeBron’s Hummer H2 birthday present.
All original sketches can be seen here, and more on the design process can be found over at Nice Kicks.