If Lou is gone after this year, who would be the most likely candidate to replace him?

In my opinion, it seems that Lou has lost interest in baseball (and the Cubs in particular), especially after the many puzzling decisions he has made this year.  I think he is ready to call it quits and retire peacefully in Tampa.  These past 3 seasons with the Cubs have got to be the most aggravating any MLB manager had to endure.  Look at his expressions when the camera pans on him in the dugout. He's already got one WS title-why go under the microscope again next year, especially with a new owner and possibly a totally revamped lineup?

The question is: who is mostl likely to replace him?  Maybe his boyhood buddy Tony LaRussa?

Please discuss.