It wouldn't be unlikely that Cain gets hurt in training prior to his rematch for the HW strap against Werdum. Cain was laid off with a training injury and surgeries for so long that there was an interim champ crowned. If Cain gets hurt prior to his rematch with Werdum for the UFC HW strap do you think that they would postpone the fight or have a replacement fighter step in against the champ? If Cain gets injured and needs say, knee surgery, he could be out for a long, long time. I don't see the UFC holding up the HW title for another year or longer. You've got Stipe, JDS, or Arlovski that could all jump in as a replacement and most people wouldn't be upset.