#1. Ronda Rousey returns
Perhaps the most far fetched prediction for the match, but it's one that has to be looked at since there's a reason why Becky Lynch still has the Championship she took from Ronda Rousey around her waist.
Rousey was pinned by Lynch at WrestleMania back in April but even though The Man went on to drop the SmackDown Women's Championship, she's kept Rousey's title and this has lead to hope that Rousey will come knocking one day soon.
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There were rumors that stated that Rousey could return and win the Royal Rumble so that she could get that re-match with Lynch, but she's Ronda Rousey, she doesn't need to win the Rumble to get a re-match, she could just walk in and decide that she wants that title back and honestly there is no one who can stop her.
Rousey is still the favorite to win the Women's Royal Rumble match at present, but her status for the show still remains unknown, so a return is definitely still possible