Another 'Transformers' movie is about to hit theaters. Do U.S. moviegoers care?

Paramount Pictures has retooled its decade-old "Transformers" franchise with a new mythology that ties the giant alien robots to the legend of King Arthur, Stonehenge and World War II. Still, after four previous movies, the Michael Bay franchise may be looking rusty to American audiences. The fifth in the series, "Transformers: The Last Knight," should gross $70 million Wednesday through Sunday in the United States and Canada, according to people who have reviewed audience surveys. Though that number will almost certainly be enough to unseat "Cars 3" from the No. 1 chart position, it will represent a steep drop from the previous installment. "Transformers: Age of Extinction," released in 2014, opened with $100 million in its first three days.