Cain vs. JDS is the only HW title fight that makes sense now. Does JDS really want to sit out and wait for AO to get back.... If anything you'd think he would want another paycheck and further cement his status as the best HW by beating Cain again...
After that if DC gets by Mir, he is clearly next, and should fight for the title after that. JDS could defend his belt twice before AO got back, if he really wanted to and didnt have any physical problems...
I also predict that Jones will move up to HW sooner than expected by most... While JDS fights AO, the UFC could have a #1 contenders fight between Jones and DC... that would be great. Jones may want a fight at HW before going after JDS.