Why is it so outrageous to think that Zwick could make an All-Big Ten team this year? Last time I checked, there's five returning QBs in the conference, and three of those play for Northwestern, Indiana, and Illinois. Everyone else (just about) is in the same boat as JZ.
If you say that Orton and Mills are givens to be selected above Zwick (Mills is not, but lets say that he is), then you have Beutjer (Ill), LoVecchio (Indy), Stocco (Whisky), Basanez (NW), Tate (Iowa), Gutierrez (scUM), Dowdell (MSU), and Cupito (Minny).
Look at the weapons and the team Zwick has around him. Other than Guitierrez, no one on that list has close to that, and most of 'em are run-first teams. I think he'd be a favorite to make the 3rd team or honorable mention.