Winning their first 5 games with a convincing win over WI could get them in the top 25. A lot depends on other teams records to that point (did some pre-season ranked teams lose a game or two, etc.).Winning the first 7 games would probably do it, but with this schedule, maybe the first 9. Beating Minnesota with even one loss, depending where in the schedule, probably puts, or keeps, Iowa ranked.
Start 5-0 and Iowa will be ranked