Here's an interesting scenario:
I belive that, aw shucks aside, Favre cares deeply about his records, and his legacy. His numbers are astounding, with his consecutive starts and touchdowns seemingly insurmountable, especially considering guys like Payton Manning are facing a harder climb. While the NFL has instituted rules to protect the QB and likely will continue to do so, they've also put more of a focus on player health, especially concussions. Cutler has already been forced to sit a game, and Rodgers might also. Ten years ago, they may have decided to just gut it out, but now they are required, by rule, to sit. I have to believe somewhere in Favre's career he played with a lingering concussion.
He should be pretty confident then that his records will stand for a loooong time. His legacy, however, has taken a big hit recently. While playing for the Vikings muddied the waters along fan lines, once he hit the hall I believed Green Bay would celebrate with him. The Sterger accusations, true or not, damage his perceived character, and that's harder to gloss over. What gesture could he make to raise his stock?
What if, "for the good of the team", Favre chose to sit against the Cowboys and we see TJack trot out on Sunday? He hinted at not playing after the Jets game, and while I don't generally put that much stock in those comments from him, I can't help but wonder if this time it isn't different. It plays to Childress's love of devious injury reports (Surprise! It's the Tarvar express! Choo Choo!), and Favre would be nobly abondoning his starting streak for the sake of his teammates, proving that he does put the team over personal glory.
But would it be taken that way? It's possible that the media would fawn over it, that fans would impressed, and give him credit for being selfless (especially if the Vikes won without him). It's also possible that the commentators instead paint it as 'the fall of Favre', using it as proof that he really is too old to play. The fans may instead think that he is ducking out under pressure. Maybe they'd see it as an ommission of guilt. Maybe they'd picture Chilly in a conductors hat. Either way, it could only serve as a temporary reprieve, with allegations still up in the air and a lot of season left to play.
I expect to see Favre start Sunday at the dome. If he sits, though, I'll wonder...