Pat Yasinkas reminds us that not every QB transition works out like Favre and Rodgers. And let's admit it, that wasn't exactly a happy breakup for all parties. More importantly he reminds us that more than a few "future of the franchise" picks haven't panned out including the failure in Arizona:
Kurt Warner wasn’t ready to hand the ball to Matt Leinart when the Cardinals drafted him in 2006. Drew Brees wasn’t overjoyed when the Chargers brought in Philip Rivers in 2004. Heck, you can go even further back. It’s common knowledge that Joe Montana and veteran Steve Bono didn’t treat Steve Young like a close friend (and I’m being very generous with the wording here) when they were together in San Francisco in the 1990s.