Rousey expressed that she wants to face someone new at the Royal Rumble pay-per-view and she specifically named Sasha Banks. Nia Jax came out and took issue with what Rousey said so Banks challenged her to a match to determine who would go on to challenge Rousey at the Royal Rumble pay-per-view.
Jax dominated most of the match but Banks was able to pull out a victory by forcing Jax to tap out to the Banks statement.
It looks like there was a creative change because the original plan for the Rumble (as of a couple of weeks ago) was for Rousey to defend against Charlotte Flair.
Here is the updated card:
30-Man Royal Rumble Match
Announced so far: R-Truth, Drew McIntyre, Big E, Kofi Kingston, Xavier Woods, Finn Balor, Seth Rollins, Jeff Hardy, Dean Ambrose, Bobby Lashley, Samoa Joe, John Cena, Elias, Baron Corbin, Jinder Mahal
30-Woman Royal Rumble Match
Announced so far: Carmella, Ember Moon, Natalya, Sasha Banks, Bayley, Ruby Riott, Liv Morgan, Sarah Logan, Mandy Rose, Sonya Deville, Alicia Fox
WWE Universal Championship
Brock Lesnar (Champion) vs. Braun Strowman
Daniel Bryan (Champion) vs. AJ Styles
SmackDown Women's Championship
Asuka (Champion) vs. TBD
Raw Women's Championship
Ronda Rousey (Champion) vs. Sasha Banks
WWE Cruiserweight Championship - Fatal Four-Way Match
Buddy Murphy (Champion) vs. Akira Tozawa vs. Kalisto vs. TBD