On Monday at 6:30 p.m. E.T., Marc Jacobs will stage a runway show in New York—two days before the official start of what remains of the city’s emaciated Fashion Week. Jacobs, the enfant terrible turned elder statesman, is arguably the last designer showing in America who can deliver something like the appointment viewing the fashion diehards will turn to Milan and Paris for later this month. Those who still bother actually attending the New York shows are more likely to do so if he is present. And then there’s the added intrigue: This is his first show since Authentic Brands Group’s aborted effort to buy the business for $1 billion.