What if nobody interfered, and the two men just duked it out until there was an eventual winner?
You can be considered an equal even if you don't win. Cena was made to look like Rock's equal at WrestleMania, even though he lost a close match. If Punk retains yet AGAIN thanks to outside interference, he looks like the weaker man, the inferior competitor, instead of an equal.
But knowing WWE, this will probably happen anyways.
This is exactly why CM Punk's current reign as WWE Champion, despite it's length, hasn't been anything special. He hasn't had any sort of dominance whatsoever.
The babyface title defenses were clean, but against upper-midcarders and jobber-to-the-stars like Chris Jericho, Dolph Ziggler, Daniel Bryan, and The Miz, and none of them were in the main-event of a PPV.
The heel title defenses were all dirty, and despite being in the main-event, all required overwhelmingly tremendous help from multiple people.
Nearly a year and a half later, Punk looks no stronger now than he did when he cut the pipebomb promo.