You've got Riley trying to implement a pro-style offense with spread-option players at Nebraska;
Boise replacing both their QB and star RB;
UCLA mostly playing to the level of their competition last season (though they return a lot of players);
Michigan is serious rebuild mode
Mizzou surprised me last year. They started like I thought they would after a good season (ie, they started poorly), but then they rebounded and won the SEC East for the 2nd straight season. They broke out of their normal pattern, so I don't know what to expect this season.
The team that worries me the most is Cincinnati. They won't come in with much respect, but Gunner Kiel can sling that ball and that's always been our biggest weakness on defense. Those five other teams we know to be ready for. This is a game that can bite us.