Holley knows a lot about the Pats because he has access. Not sure he knows a lot about the rest of the NFL unless he gets that from his alter ego Michael Smith at ESPN. Some outlets are going to try to spin the retirement as intrigue, because the ball washing retirement pieces will have limited shelf life (please god).
Tuna could use a veteran QB. However, this one remains the property of the GB Packers until he files his retirement papers, and even thereafter. I think part of Brett still wants to play, but just on Sunday. The part that is toast is what allowed him to win in the second half of 2006 and most of 2007. That part struggled with the Tuesday through Saturday workload required to manage a game and a young team as opposed to just slingin' it to veteran WR's. Tuna ain't got none of those, unless Keyshawn un-retires, and that likely wouldn't be enough.
Greenbay has decided that the Sunday part of Favre is not worth $12M on their cap. They want him to retire. They have built a nice young nucleas, and they probably expect it may take a step back this season but in the long view that will be OK. If he could mentor and backup it would be different. They could work out a deal to lower that cap. But he can't and he won't, so I think he stays retired. No way he jeopardizes the legacy to go somewhere else for a year that could get ugly.