It was previously reported that WWE officials were talking about doing a John Cena vs. Randy Orton match at WrestleMania 30. This appears to be the case after the staredown between the two that ended last night's Survivor Series pay-per-view.
What's not certain yet though is what will be done with their respective Championships. There hasn't really been any talk of merging the WWE Championship and World Heavyweight Championship together, and it was actually reported that WWE officials are looking to make the World Heavyweight Championship seem as important as the WWE Championship again with Cena as the World Champion.
If Cena and Orton are still the Champions heading into WrestleMania it's uncertain if either of the Titles will actually be on the line or if it might just be a Champion vs. Champion non-title match.