While I agree that he'll probably be traded, I wouldn't be absolutely shocked to see him stay either. While he hasn't lived up to his huge versatility hype, he did give us options at both inside and outside LB positions. He has indeed provided some production, just not as much as we expected. It's interesting that he was quite a force in the SB, and had a decent year in 2008 also. We were all very upset when he broke his arm, as he was showing some good force at times in 08. I'll always remember the Brett Favre sack when he took down 2 guys.
He obviously didn't have his heart into it last year, as there are reports of problems with BB and positioning all the way back to the very 1st game vs. BUF. It'll be interesting to see if Belichick thinks he can play still in whatever role he may see fit. It's possible also that BB is waiting for some other, better options at the position before he decides one way or the other.