This study was conducted to understand the mechanisms of entertainment content production network formation and the role dynamics that occur within them. In a 2003 prior study, the researchers argued that role dynamics can emerge due to changes in the external environment, and through empirical analysis of films produced between 1991 and 2000, they concluded that during periods of rapid environmental change, networks that experienced role dynamics performed better than those that did not. In the same vein as this prior research, the present study analyzed the degree of intensification of role dynamics occurring in film production networks for movies produced between 2001 and 2006 under conditions where structural changes in the external environment had become generalized, empirically re-examined how such role dynamics affect network organization performance, and furthermore, empirically verified whether such role dynamics remain significant even when specific environmental constraints (i.e., major distributors' investment in film production) are imposed, thereby advancing the claims made in the prior study.