People have to be a little cautious, each year it different. The are retirements, injuries and some players not having good season plays. If you remember the St Louis Rams, greatest team on turf. They won a Super Bowl , went to another and got upset. They had their super QB and signed all their core players to good contracts. They were predicting they would win the next 3 to 4 SBs and had no competition. What happened, their super QB gets hurt, the players do not play up to their contracts and they never get back.