Tail between his legs
Actually, I love the way this entire fiasco has played out.
Cutting Law from the team was a perfect example to the other money hungry players on the roster that "that sh!t wont fly in Foxboro; if we're going to release our star SS and trade our franchise QB and cut our pro-Bowl CB, there's no doubt in hell what we're willing to do to you." So, although we lost Law, we still gained, just by firmly establishing the precedent.
Then, fact is, Law didn't get a big multi-year contract on the free agent market. No one wants a slightly aged corner for that kind of money. The Postons look like fools for making their client look like a fool, and then not landing the cash on the backside of the entire negotiation. Belichick called their bluff, and they were left holding nothing.
If Law comes back to Foxboro, I'm hoping that he negotiates the deal himself, after realizing that the rest of the NFL is just not interested, and that the Postons are running him around for nothing. Just before he signs the deal, he should fire his agents, and hopefully the rest of their clients will take a hard lesson.