Most overhyped for me is hands down Ohio St. While they do deserve a high ranking based on last year's final result, I am fairly certain they will take a step back.
The reasons:
1) Teams do not work as hard after big surprise years.
2) They lost key contributors on defense.
3) They will not get repeatedly lucky this year.
4) They have tough games on the road.
5) Their defense will not be as good, thus forcing Krenzel to win games. He will not thrive in that role.
6) They have offseason controversy with Clarett.
7) They will not sneak up on anybody.