Complex sentence: The 1980s would see the action film take over Hollywood to become a dominant form of summer blockbuster; literally "the action era" popularized by actors such as Sylvester Stallone, Arnold Schwarzenegger, Bruce Willis and Chuck Norris.
Split into simpler sentences: The 1980s would see the action film take over Hollywood to become a dominant form of summer blockbuster. "The action era" was popularized by actors such as Sylvester Stallone, Arnold Schwarzenegger, Bruce Willis and Chuck Norris.