They would be nuts to bring him back IMO.
Face it, unless the Cubs go sign 2 or 3 other big FA this offseason, they will be no better than this year. Assuming Burnitz is gone, they have absolutley no OF. It would surprise me if Walker is back also. And maybe Maddux retires. After 2003, they built their team for the next couple years. I'd say that is out the window at this point.
They have Cedeno for SS who should get every chance IMO. And I don't know enough about him, but maybe he could fill that leadoff role.
None of it will matter though unless they get more than 2 quality SP (Prior and Zam). Hmm, Jerome Williams as their #3 SP? Should be fun.