NEW YORK — Two New York City Madonna fans are taking the pop star to court over the late start to her Barclays Center concert last month. Michael Fellows of Brooklyn and Jonathan Hadden of the Bronx say they were “lulled into purchasing tickets” for the seven-time Grammy winner‘s sold-out Dec. 13 concert at the Brooklyn arena — but couldn’t get into the groove after waiting hours for her to hit the stage. The complaint, filed Wednesday in Brooklyn federal court, argues that tickets stated the show would start at 8:30 p.m. However, with Madonna not taking the stage until sometime between 10:45 …