NEW YORK — The lineup of sports legends simultaneously on the stage at Fanatics Fest on Friday night was almost absurd. There was Tom Brady, the greatest Super Bowl champion of all time. There was Novak Djokovic, the winner of more men’s Grand Slam tennis tournaments than anyone else. There was Kevin Durant, the only four-time Olympic gold medalist in men’s basketball history.And before they left, they all got a selfie with Lionel Messi.Let that be the latest proof of Messi’s power: Even the biggest stars in the sports universe clearly enjoy a chance to be around the best soccer player of all-time. They’ll all be watching Sunday — along with probably 1.5 billion other people worldwide — when Messi and Argentina face Spain in the World Cup final.“We will give it our all,” Messi said.The star-studded news conference was expected to be Messi’s last public appearance before Sunday’s final in East Rutherford, New Jersey. FIFA decided to use Fanatics Fest — a four-day celebration of sports in New York, replete with autograph signings and celebrity appearances — as the backdrop for its preview news conferences, meaning hundreds of people got the chance to get a glimpse of Messi in the sort of setting not usually open to the public.“It goes be …