IS will hit back—where and when is the only question. I Believe they will Do what they say and hit New York. How is the only question. Might be a few Lone wolfs start shootin’ folks on the subway—to a few pressure cooker bombs—Or a plan to re-do a 9-11 of some sort. It might be a Mumbai Sort of Attack—hitting with a group of armmed people at a Iconic Hotel (The Waldorf—or Trump Tower—or that place where Lennon was shot) —cut off some heads—shoot folks etc... They might go for Wall Street—or the St. Pats on a Sunday. Might be gas in the subway—or poison in the markets-or restaurants. A Broadway show might be a good place for terror as they did once in Moscow.—a landmark could do as well like Statue of Liberty, Grants Tomb, or Freedom Tower? The cards are in their hands now—and we must wait.
From other threats I’ve seen it seems they may just do individual attacks on random people in various places. If causing terror is their aim, that would work. Plus it’s easier as there is no security in less populated areas.