#1 Sasha and/or Bailey go up against Ronda Rousey
Alexa Bliss announced her new talk show "A Moment of Bliss" and her first guest is going to be the RAW women's champion, Ronda Rousey. Generally, these segments are used to start a new feud, mainly for the host but given the unclear status of Alexa's return to the ring, Bliss can use the segment to set a new rival for the champion.
Alexa coming back to the ring would be a great moment but it's improbable, she could even bring up Lacey Evans for a one-off match against Ronda Rousey but it wouldn't be a Big 4 PPV worthy match.
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Moreover, Rousey has already defeated all the heels present on the roster. So, Bailey and/or Sasha are the only options left apart from Ember Moon, which isn't particularly an exciting matchup. It also plays up with the idea of Ronda Rousey having problems with all members of the WWE's Four Horsewomen leading to a future dream contest between WWE's Four Horsewomen and UFC's Four Horsewomen.