The NBA labor issue appears headed for the courts.  The Players Association has rejected the NBA's latest proposal and intends to file an antitrust lawsuit against the league.  Union Chief Billy Hunter announced that negotiations have completely broken off and that the union will disband in order to pursue legal action for unfair labor practice.  The NBA presented a new labor offer on Thursday and the union examined it over the weekend before presenting it to player reps on Monday.  NBA commissioner David Stern said if the deal was rejected, future proposals from the league would be less favorable for the union.  Had the players accepted the deal, a 72-game season would have begun December 15th.  Now, further cancellation of regular season games is expected.