If you recall, they initially announced the impasse in their Q3 Conference Call. The imperative will be to provide positive guidance during next week's call, the MOST positive outcome being that a settlement has been reached. I believe that if no settlement is announced at that time, the odds diminish for any agreement being reached as the impasse escalates to Defcon3.
ESRX has paid a steep price for this dispute, as has Walgreens. I have said all along that both sides would benefit by finding a common high-ground point and mending their fences.