I have had this terrible thought for about a month now -- we may not see Sidney Crosby even at the start of the 2011-2012 season.That Crosby suffered setback from his January concussion(s) mid-way through the playoff series versus the Lightning cannot be a good thing. Head injuries are funny. Not funny ha ha or funny witty, but funny sad ... really, really sad. And also tricky. There's not a straight line of recovery, the way there often is with a knee injury or shoulder injury. Brains are complicated. Months had passed and yet, Sid still had a nasty bout of symptoms. And I wonder ... if three months were not enough for his head to get better, why do we think six months will make it better? Or eight months? There are no guarantees here.