I think this pretty much hits it on the head. I see the Maloofs filing for relocation, and effectively daring the NBA to turn down the request. Presuming the NBA does this, they then turn back and file an anti-trust lawsuit.
However, I don't think that it will get as far as the NBA forcing the Maloofs to sell the team, at least not by next year. If there's a lawsuit, there's probably basketball in Sacramento next year while things get sorted out in the courts.
I also think a lawsuit is a bad move for the Maloofs, because even if they win, they lose. You can't have it both ways - you can't use the courts to break a single entity (the NBA) into a group of entities (individual teams) and then also hope to have the court force those individual teams to do business with you. David Stern is not a man to be messed with. If the Maloofs file an anti-trust lawsuit and lose, they'll be effectively forced to sell. But if they win, they'll have nobody to play games against. Lose-lose scenario.
And still, I see the Maloofs doing it. Sad, really.