Which actor's endorsement deal for a film franchise is considered revolutionary for linking performance-based compensation to merchandise sales, creating a model now standard in Hollywood blockbusters?

In the film and television industry, celebrity endorsements can significantly impact product sales and brand visibility. Major studios and production companies carefully select which stars promote their films and associated merchandise. This trivia question explores one of the most lucrative celebrity endorsement deals in entertainment history that changed how studios approach merchandise tie-ins.

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Robert Downey Jr. for Iron Man/Marvel films
Harrison Ford for Star Wars
George Lucas, who famously kept merchandise rights instead of directing fees for Star Wars
Steven Spielberg for E.T. with Reese's Pieces product placement