The Green Bay Packers have had months to think about their last meeting with the 49ers.And those memories haven't been sweet ones.Many Packers still have visions of No. 7 making plays all over the field, rushing for 181 yards and two scores and throwing for two more touchdowns.Niners quarterback Colin Kaepernick was brilliant in that 45-31 playoff victory, and Green Bay looked helpless for most of the game trying to stop San Francisco's read-option offense.Now, heading into the 49ers' opening game of the 2013 season Sunday against Green Bay at Candlestick Park (1:25 p.m.), the Packers say they're eager for a rematch, to show they can stop the read option and slow down Kaepernick."We had an entire off-season to focus on last year's loss, having time to kind of figure out a way to defend that," said Packers linebacker Clay Matthews. "We obviously like to think we're better prepared to defend that type of offense and what he brings to the table."It's a marquee matchup in Week 1 of the NFL season, featuring two premier quarterbacks (Kaepernick and Aaron Rodgers), a 49ers defense that appears to be even better than it was in 2012 and two excellent coaches in the Niners' Jim Harbaugh...