The Transformers began as a modest import toy only to become a multibillion-dollar merchandise line that would inspire a multibillion-dollar film franchise.
Transformers soars in popularity, but Hasbro sidelines Marvel and kills off Optimus Prime to push new toys in a risky move that could make or break the franchise.
Transformers were fading by the 2000s, but Steven Spielberg saw big-screen potential for the franchise and tapped Michael Bay, who doubted an '80s toy would be popular with a new generation.
When Transformers hits big at the box office, Paramount rushes a sequel amid a writers' strike, tight deadlines, and Megan Fox and Shia LaBeouf dominating the tabloids.