The recent revival and reworking of I Can Get It For You Wholesale by Classic Stage Company brilliantly demonstrated the possibility of staging a riveting musical with an unlikable and irredeemable protagonist—in that case, the avaricious garment-industry upstart Harry Bogen. Now composer-lyricist Jason Robert Brown and book writer Jonathan Marc Sherman showcase their own antihero with the new musical The Connector at MCC, featuring wunderkind journalist Ethan Dobson (Ben Levi Ross) as the show’s despicable, win-at-all-costs centerpiece. Daisy Prince, who directs, is credited with having conceived the story.