Michael Dante DiMartino, co-creator of “Avatar: The Last Airbender,” acted as a director, animator, and storyboard artist for early episodes of “Family Guy,” while working for Film Ronan, and he even directed six episodes from 1999 to 2002. “Avatar” co-creator Bryan Konietzko was also involved with “Family Guy” and Film Ronan as a storyboard artist and character designer.