For those wondering, they are not unifying the titles as of now. The way the promo was worded made it seem like they were unifying both titles. That is not the case. While John Cena claimed he was pushing for both titles to be unified, and Stephanie McMahon did say that she and Triple H have "considered the idea" - at this time, it does not appear that the two titles will be unified. WWE.com clearly noted the following: "Who will be left standing with both the WWE and World Heavyweight Championships when the dust settles?"
The following is the full blurb from WWE.com:
UNIONDALE, N.Y. – There can only be one Face of WWE. And although he remains WWE Champion, the odds of Randy Orton reclaiming that symbolic status have just been cut in two by an unlikely challenger: World Heavyweight Champion John Cena. In Raw’s opening moments, The Champ took vocal exception to Orton’s post-victory posturing and offered The Apex Predator a chance to prove his worth in a match that places both World Championships on the line and would name a true Face of WWE. It was a jaw-dropper of a challenge, but the real surprise came when The Authority accepted the Cenation leader’s proposal and decreed the contest would take place with the most unpredictable of stipulations. Who will be left standing with both the WWE and World Heavyweight Championships when the dust settles?
It should be noted that original plans called for Randy Orton to feud with Mark Henry heading into WWE TLC so something major changed within the last 24 hours. More on that shortly.