WrestleMania 31 is the biggest WWE pay-per-view of the year, and there are several variables that will determine whether the annual event will be deemed a success or not.
How well certain wrestlers perform and the booking of key matches is crucial to how WrestleMania will be remembered. As the largest event in all of wrestling, there will be intense scrutiny on how the PPV unfolds.
Here are the ultimate X-factors who will affect WrestleMania 31.
The Undertaker
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