The most financially successful era in NBA history will continue uninterrupted for at least six more years, after the league and its players came to a tentative agreement on a new Collective Bargaining Agreement that will kick in this summer. It took more than a year of bargaining, with the intensity and expectation growing in recent days, and the handshake agreement was struck in the wee hours of Saturday morning — shortly after the league intended to tell the National Basketball Players Association of its plan to opt out of the current CBA on June 30. Instead, a deal got done, at least in principle.