While Creative might always come up with a storyline that calls for a Triple Threat, I hope they can leave this one as Cena vs. Rock. I believe this plan was formulated over a year ago, and it was agreed by Cena & Rock that: "I'll job for you in '12 and you'll return the favor in '13." If that's the case, adding Punk to the equation would only detract from what Cena is apparently destined to accomplish this year.
As the #1 man in the company, Cena was a hell of a sport to agree to lose to a guy who comes in only occasionally (which presumes Cena has the corporate power to refuse). Not only that, the defeat is something Cena has had to live with for a year. Now, the year is almost up and it's time to get back on track. After all, John Cena is the future of WWE, not the Rock. The two-year plan was a bold move by WWE (Can you imagine Hulk Hogan agreeing to something like this in his prime?) but it's time to get Cena back on top where he belongs, despite the screaming we're going to listen to from the Cena haters.
Plus, by the time WM29 rolls around, C.M. Punk will apparently have failed to win back his title at Elimination Chamber........after all, if Punk wins it back at EC, what would be the purpose of having Rock at WM at all?
No, John Cena unselfishly did the job a year ago and had to live with the "failure" for a whole year. It's time to set things straight; have Cena win a one-on-one with the Rock at WM, have them finish as friends....and let Rock return to Witch Mountain to pursue his chosen profession.