Without a crystal ball, it's hard to tell exactly how the industry will shake out, but the next several months will surely be interesting. CVS and Caremark will immediately start combining their operations, while retailers like Walgreen and PBMs like Medco (NYSE:MHS) will either consider pursuing their own mergers or decide to go it alone. For CVS and Caremark, the best place to view the developments may be on the sidelines. Once the merger is completed, however, the potential exists for a new paradigm in the drug distribution industry.