Kind of along the lines of what Heismanberg is saying: if Geno doesn't prove he's the future of this team in 2014, we'll be picking a new guy in 2015. You can't say he doesn't have weapons anymore. He has a reasonable committee of running backs as well as Decker, Amaro, and Kerley for the passing game. If he can't succeed at least reasonably, he's done. (Though you'll know he's done long before December because Vick will be the starting QB already.)
I don't get the idea of rehashed starters anyway. It's rare that a Manning becomes a free agent, or the possibility that Cutler could have hit the open market this past year. Generally, if a QB is available on the market it's because he was a failed starter.