This doesn't just come down to what he said... Much of it is the NBA-Owners Contract... Sterling entered an agreement, he entered that contract that says if 3/4 of the other owners vote him out, he's got to go... In the past he had vetoed or OK'ed other owners coming into the NBA, or leaving(selling their teams to someone else).. He himself willingly entered that agreement, and participated in it..
He's out, and again no court will say otherwise..
But he does seem like the type of guy who will want to drag this out, so expect him to fight this.. It's gonna be a mess.