#2 To get the rub from defeating a legend
One would assume that after the outcry that accompanied Goldberg defeating The Fiend, it will be Roman Reigns who stands tall at WrestleMania. In any case, Roman Reigns was booed out of the building after he defeated The Undertaker at WrestleMania. I have a feeling that the outcome will be very different indeed if Roman Reigns defeats Goldberg at the Show of Shows.
A lot of people had assumed that The Fiend would get the rub from defeating Goldberg when the match was first announced. While there's no certainty even now that Roman Reigns will come out on top at WrestleMania, chances are that he will get the rub. And this is not a small thing at all because there are only a handful of WWE Superstars who have defeated Goldberg since the monster made his debut.
For a WWE Superstar to defeat stars like The Undertaker and Goldberg clean will go a long way towards establishing Roman Reigns as the king of the yard, and the greatest of our time.