How Disney’s "Black Panther" proved the power of cross-platform marketing

The Walt Disney Co., the entertainment giant, built a hugely successful cross-platform marketing campaign in support of "Black Panther", a pioneering superhero movie.

As the awards season has clicked through the Golden Globes, the Critics’ Choice Film & TV Awards, and the Screen Actors Guild Awards, the annual ramp up to the Academy Awards already has identified the winners from the 2018 season of film.

One...