Posted by Sabrina B. @gametimegirl & @DJJUANYTO Advertisers still sitting on the fence about the 2012 Super Bowl may soon find themselves flat on the ground: Only five slots remain. Never mind that the season hasn’t even started, with the National Football League’s first game scheduled for Thursday. Just five 30-second Super Bowl ad slots — at a record $3.5 million each — are left, says Seth Winter, head of sales for NBC Sports.