The 2007 installment of WWE's Vengeance: Night of Champions pay-per-view featured every champion defending his or her title. Since then, Night of Champions has been an annual event.
In its five-year history, the WWE Championship has always been a focal point of the show. The way things are shaping up, CM Punk vs. John Cena for the WWE Championship will main-event this year's event.
As we prepare for Night of Champions 2012, let's take a look back and rank the five WWE Championship matches in the PPV's history.
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