If you don't believe Brett Favre has a way of not being able to make up his mind, you can refer to the Sports Illustrated issue of March 17, 2008, after the veteran quarterback had announced his retirement from the Packers.
Yes, if you believe he is going to join the Vikings after he had announced his retirement -- and then tried to rejoin the Packers, who didn't want him back, and wound up playing last season with the Jets -- and then announced his retirement yet again last February, you shouldn't be surprised whatever he decides: to stay retired or join the Vikings.
The front page of that issue had a headline that read "Hard to Say Goodbye." Favre's quote under it read: "I hope people appreciate me, the way I played the game, as much as I appreciate them."
"Top of His Game," read the headline above the start of the story. Under that headline: "It was never about me."
The story by Alan Shipnuck read: "After 16 seasons of giving the Green Bay Packers all he could give, Brett Favre knew it was time to quit, and he left football the way he'd played it -- raw, passionate and honest.
"In the end, Brett Favre did it his way, as he always has.
"... And when it came time to walk away from football, Favre was just as unpredictable. Over the last few years, pondering retirement had been an offseason ritual for Favre. This winter, however, the inner debate should have been a mere formality. In 2007, his 16th season in Green Bay, the 38-year-old Favre led a young and promising team to the cusp of the Super Bowl, and the Packer Nation fell in love with him all over again. Statistically, he had his best season since Green Bay's Super Bowl-championship year of 1996."
So today, according to NFL.com, Favre is going to announce his decision.