I give him another year. Being so close to the title last year I can see him testing the waters elsewhere if the Tigers can't pull through this season.
http://www.rantsports.com/mlb/2013/03/07/cant-blame-justin-verlander-if-he-leaves-the-detroit-tigers/
http://www.rantsports.com/mlb/2013/03/07/cant-blame-justin-verlander-if-he-leaves-the-detroit-tigers/