The Rock to cost CM Punk title?
CM Punk got injured at a bad time, and a TLC Match is a lot to ask after injury and surgery. We don't know what his real condition is but, what if next week The Rock cost CM Punk his longest reign in the last 25 years by interfering in his match with Ryback.
This would let Punk sit out for sometime, give Ryback his first title and prolong the Rock vs Punk match until Punk is in better health.
Ryback would then go on to face and beat the Rock at Royal Rumble, putting him over majorly, and then The Rock would win the Elimination Chamber, that he's already scheduled to appear at.
Punk and Rock would then be able to have a singles match at Wrestlemania.
I think this of course with WWE's plan, but IMO a suitable replacement. My speculation is plans that Ryback or Cena is scheduled to win The Rumble. Cena would face the WWE Champ at Mania, while Ryback would face the world champ.
I believe WWE's ultimate plan is to put Rock vs Cena vs Punk for the WWE Championship at Mania. With Punk losing at Rumble but someone forcing himself into Rock vs Cena II making it a Triple Threat, probably by a rematch clause.