#2 The element of surprise
WWE loves surprising us at the Royal Rumble. To the most part, it's the return of legends and NXT Superstars. This year, WWE did a great job with the Women's Rumble, because they chose the route of not having any returning legends, as opposed to 2018 (which had many of that category).
However, apart from slight surprises, WWE didn't have a real big surprise that would have fans buzzing. The booking itself was great, but WWE adding Nia Jax to the men's match definitely goes down as the biggest surprise in the Rumble PPV this year.
As we mentioned, it's got people talking, and that's what WWE wants. There was no Kenny Omega and no real returning superstar, so they needed to pull off a fast one on the fans. Although we aren't big fans of the decision, it's still far less outrageous than Roman Reigns entering at #30 in 2017!