Which 2016 superhero film pioneered the use of 'in-character' social media marketing, with the lead actor maintaining the character's persona across all promotional platforms for over a year?

Test your knowledge about groundbreaking digital marketing campaigns in the film industry! Over the past decade, movie studios have revolutionized how they promote new releases - from viral social media campaigns to interactive experiences that blur the line between fiction and reality. This poll explores a famous marketing innovation that changed how major films connect with audiences.

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Deadpool (Ryan Reynolds maintained the character's irreverent fourth-wall-breaking persona across all marketing)
Doctor Strange (Benedict Cumberbatch conducted interviews and social media posts as if he had mystical powers)
Suicide Squad (Jared Leto sent disturbing 'Joker' gifts to castmates as part of the marketing campaign)
Captain America: Civil War (Cast members maintained 'Team Cap' or 'Team Iron Man' personas throughout all promotion)