In this NBA, this much is already clear: There will be a new champion. A lot of first-time champions, too. The second round of the NBA playoffs start on Saturday night, and nowhere to be found are the franchises that have combined to win almost two-thirds of the titles awarded in league history. There are new faces, like a Phoenix team that’s in the second round for the first time since 2010, Brooklyn for the first time since 2014, Atlanta for the first time since 2016. Plus, when the NBA gets down to its final eight teams, there will be no more than eight players—and possibly as few as five, depending on how the last remaining first-round series between Dallas and the Los Angeles Clippers ends—who have previously won a championship ring. So, for virtually everyone left in the playoffs, this is a whole new world. New teams. New faces. …