This is not how you want your tenure as a head coach to start--with a Richie Incognito issue.
I don't know what Rex Ryan thinks he's going to get out of a player who has uniformly been considered a detriment to good order and discipline. You might get a renewed level of effort out of him, but you'll never get him to buy in and contribute in a positive way. The NFL has failed to deal with poor player conduct and now Incognito is the face of the Bills.
How much do you want to bet that they will cut him in August?