I've already commented on this in past pieces, but Iowa isn't going anywhere in 2013.
First the Hawkeyes will walk into Big Ten play with at least one loss. I think it'll be in the opener to Northern Illinois. A loss at Iowa State two weeks later clearly is not out of the question.
The Hawkeyes may not get to four wins. I don't see them beating MSU, OSU, Northwestern or Wisconsin. They should beat Purdue, but that's all I see. Maybe an upset in there at Iowa, but it would have to be against Michigan or Northwestern.