#1 Charlotte Flair
Charlotte Flair defeated Becky Lynch with the help of Lacey Evans to become the new SmackDown Women's Champion. And just when it seemed all was done and dusted, Bayley successfully cashed-in her briefcase to become the new champ.
Thus, WWE could have Charlotte portray as if she was robbed of the title when she was vulnerable after a hard-fought victory against Becky Lynch. She could further go on claiming a rematch to lay down the breadcrumbs for a potential feud against the current champion Bayley.
Given the affinity of WWE with The Queen, plus how she has always been around the title scene on the blue brand, a potential feud against Bayley seems totally on the cards.
Nonetheless, both these women are proven performers and can put together an intense and gripping feud if WWE books it properly. Furthermore, Bayley's youthfulness and agility against Flair's experience and unique skill set would be totally worth watching.