#2 John Cena vs. The Rock (WrestleMania 28, 2012)
In terms of mainstream recognition and box office numbers, this was the biggest match of the decade, with WrestleMania 28 being the most financially successful pay-per-view in the company's history, a record it will likely keep given that the Network came a couple of years later.
The match was set a year in advance, which was a smart move from WWE. People had fantasized about the match for years, and The Rock's return in 2011 paved the way. Why not make fans wait a year, knowing it would happen? The strategy obviously worked.
Corey Graves deleted his Tweet! More details HERE.
Aside from the mainstream recognition, this match worked itself into CM Punk's aforementioned pipebomb and the Summer of Punk, which would itself influence much of the company in later years.
This might have been the last mega match in the company's history, given that megastars like The Rock and Cena appear to be things of the past.
Perhaps this was the true "end of an era."