Overall, in 2009, Iowa should be anywhere from 9-3 to 11-1, or if they get lucky or improve beyond my expectations, 12-0. They have a very tough schedule next year, taking on Arizona, Northwestern and Minnesota at home (all that will have improved a lot) and going on the road at Penn State, Wisconsin, and Ohio State.
The Hawkeyes have only five out of 11 returning starters on offense, but almost all of those six replacements have seen considerable playing time. QB Ricky Stanzi, who could be very good next year, will have plenty of time to pass behind a great Iowa O-Line, and he'll be passing the ball to excellent receivers.
RB Jewel Hampton has some big shoes to fill if Shonn Greene leaves (which he likely will) for the 2009 NFL Draft, but Hampton was only a freshman, and if he had as many carries as Greene in 2008, would've had around 1445 yards. Hampton has shown a LOT of potential, and he should have a lot of help from Iowa's linemen. This will be a very well-rounded Hawkeye offense.
On defense, Iowa has 8 out of 11 starters returning, with one of those three replacements likely to be pretty good (Shaun Prater, CB). Iowa's excellent rush defense might be slightly worse, but should still be top 25.
Their pass defense should jump way up from 41st in the nation to probably around top 20 or maybe even top 15. In 2008, the Hawkeye defense let up an average of only 13 ppg. It'll be fun to see what they do in 2009.
But, looking beyond 2009, Iowa's future looks even better. In 2010, they could possibly be one of the best teams Iowa has seen. On offense, Ricky Stanzi could have developed to be one of the nation's best QBs, and RB Jewel Hampton might also be one of the nation's best.
Stanzi will be able to pass to DJK, Colin Sandeman, and Allen Reisner, who all will have developed into very good receivers by then. The only question is their O-Line, but they'll still have Bryan Bulaga, Julian Vandervelde, and Rafael Eubanks (Bulaga was in contention for the All American team, but didn't quite make it- he was only a sophomore), all of which good in 2007 and/or 2008.
On defense in 2010, Iowa will have all of their starters from 2009 returning except LBs Pat Angerer and AJ Edds. Jeremiah Hunger, the other LB, was a huge recruit and is already playing well. He will return that year, too. Every single defensive lineman will return, as well as every single defensive back. A tough pass defense will be even tougher, possibly one of college football's best.
And, in 2009 AND 2010, Iowa has all of their kickers and punters returning from 2008. They just need to find a punt returner-Andy Brodell was good at it in 2008 but is leaving. WR Colin Sandeman looks to be a good canidate for the position.
2009 and 2010 look both to be very good years for Hawkeye football. These teams could likely win the Big Ten Championship, and/or possibly even the national championship. After two consecutive 6-6 seasons, Iowa looks like it's finally turning around.