Ronda Rousey WWE UFC
Ronda Rousey speaks as she becomes the first female inducted into the UFC Hall of Fame at The Pearl concert theater at Palms Casino Resort on July 5, 2018 in Las Vegas, Nevada. Ethan Miller/Getty Images

Sasha Banks earned a Raw Women’s Championship shot against Ronda Rousey at the 2019 WWE Royal Rumble by defeating Nia Jax Monday night. The victory not only set up one of the top matches at the year’s first pay-per-view, but it also might have set the stage for an even bigger storyline in the future.

There have been rumors for well over a year that WWE might one day pit the “Four Horsewomen” of MMA (Rousey, Shayna Baszler, Jessamyn Duke and Marina Shafir) against WWE’s version of the group (Sasha, Becky Lynch, Charlotte Flair and Bayley). All four of the mixed martial artists have been signed to the wrestling promotion for several months, making a potential feud possible in 2019.

In an Instagram post Tuesday, Rousey called out Sasha and her fellow Horsewomen.

It might not be long before one of Rousey’s friends joins WWE’s main roster. Baszler is the current NXT Women’s Champion, and she’s held the belt for more than 200 total days over the last year.

Rousey will almost certainly clash with at least one of WWE’s Horsewomen at the year’s biggest event. She’s expected to face Becky in a title match at WrestleMania 35, and Charlotte will likely be included to make it a triple threat match.

The women’s match is the early favorite to be the WrestleMania 35 main event at MetLife Stadium on April 7.

Sasha has little chance to defeat Rousey at the Royal Rumble, but she could win a title soon enough. With WWE set to introduce women’s tag team championships, Sasha and Bayley probably have the best chance of winning the titles first.

Whether it’s at SummerSlam, Survivor Series or another PPV, WWE could be in position to set up a major match between the two factions at some point in 2019.