As a film critic, I have a developed a theory over the years. It goes like this: The quality of a film is often in inverse proportion to the number of times I am forced to watch a trailer for it. That theory strongly suggested that Warner Bros.’ “Focus,” the new film with superstar Will Smith and rising star Margot Robbie from “The Wolf of Wall Street,” was not going to be very good. In this case, my theory proved true. “Focus,” which has a terrible title, will not get Smith out of the slump he has been in since “I Am Legend” (2007).
Yet another tale of modern-day con artists, “Focus” suggests that every time you step into a public space, 25 people try to get their hands in your pockets to grab your wallet, a premise demonstrated in one of the film’s “Now You See Me”-style deconstruct-the-trick scenes.