Adam Schefter thinks so. If the Packers decide to trade Favre, these would all make sense. However, Schefter thinks it unlikely that Favre will play in 2008.
I seriously doubt he would want to play for us with our current offensive line. I would be stoked though.
I seriously doubt Favre would WANT to come back to any of these teams. If he were to return it would be to WIN and none of these 3 are in a position to do that anytime soon.