GREEN BAY, Wis. -- Nick Barnett tried suppressing a smile as he listened to the question. "We've got some things in our pocket," he said, a slight grin remaining on his face. A similar query came his way a few minutes later. Do you think your team will be more aggressive on defense this season? "We're working on some things," said Barnett, who is entering his sixth season as the Green Bay Packers' middle linebacker. "I don't want to give too much away on the packages we've been working on, but I'm really excited.