Apparently a chance for a Rousey debut at the Rumble, yes please.

Looking like she's already the favorite too.
There are already betting odds for the winners of the men's and women's Royal Rumble matches. Ronda Rousey is the early favorite for the women's match and here are the current odds:
Ronda Rousey -111
Asuka +200
Nia Jax +500
Becky Lynch +750
Paige +750
Nikki Bella +1000
Bayley +1200
Charlotte Flair +1200
Ruby Riott +1200
Sasha Banks +1200
Alexa Bliss +1500
Carmella +1500
Shayna Baszler +2000
Stephanie McMahon +2000
Marina Shafir at +5000
AJ Lee at +6600
James Ellsworth at +10000.
Here are the early odds for the men's Royal Rumble match from favorites to underdogs:
John Cena 5/2
Roman Reigns 3/1
Shinsuke Nakamura 7/2
AJ Styles 4/1
Bobby Roode 8/1
Seth Rollins 8/1
Braun Strowman 10/1
Samoa Joe 12/1
Finn Balor 14/1
Brock Lesnar 16/1
Kevin Owens 16/1
Randy Orton 16/1
Sami Zayn 16/1
Bray Wyatt 20/1
Dean Ambrose 25/1
Baron Corbin 28/1
Jeff Hardy 28/1
Kenny Omega 28/1
Matt Hardy 28/1
Rusev 28/1
The Miz 28/1
Chris Jericho, Goldberg and HHH at 33/1
Undertaker at 40/1
CM Punk, Kurt Angle and Daniel Bryan at 50/1
Batista, Shawn Michaels and The Rock at 80/1
Hulk Hogan, Steve Austin, Conor McGregor, Floyd Mayweather, Shaq & Vin Diesel at 100/1