If New Yorkers are willing to overemphasize a three-game sample while also ignoring the fact that the NBA preseason is relatively meaningless, then there’s some tremendous news afoot: Linsanity is back!

After signing a three-year, $36 million contract with the Nets in July, Jeremy Lin is back in the city, where he became a breakout star during the second half of the Knicks’ tumultuous 2011-12 season. That season ended with knee surgery and an exit from New York. He’s played for three other franchises over the last four seasons,...