Serious wild card contender, but that's not saying much.
I think Favre's head is a bit messed up and he'll resent not finishing his career in Green Bay. This will result in a very shaky Jets training camp and early season. However, the guy is a competitor and will settle in and will help the Jets win a couple of games they probably wouldn't have won otherwise, putting them in contention for the 6th playoff seed. Still, he's not the guy who won 3 MVPs anymore. If the Jets expect him to be the missing piece to a serious title run, they're high.
Regards,
Chris