I actually never think there are any gimmies for ****braska anymore, besides the South Dakota States of the world, that are likely wins.
Purdue is actually regressing under Brohm, though, or at least they are definitely not getting better. 7-6, 6-7 in the first two years (Back to back 6-6 regular seasons, winning the first bowl game and losing last year's), and now going either 4-8/5-7 in year three. I would say they are on par with ****braska as a program right now, but yes, they could still easily beat them in week one next season.
I don't pretend to know how Cincinnati will be as a team next year, but also wouldn't be surprised to see that go either way. Same feeling on @Northwestern and home vs Illinois, although I think ****braska will likely be favored over Illinois at home.