This is a column about business and the power and mystery and marketability of an athlete's image, because while no one knows for certain if Tebow will have a role with the Eagles this season or, if he does, what that role will be, we do know this: He had that power, and over the last 21/2 years, he has lost a lot of it. It has been a remarkable and precipitous fall, given where he stood on March 26, 2012, the day that he and America may have achieved Peak Tebow.