#1. Asuka

Why doesn't Shayna Baszler just go straight after Asuka and challenge her for the RAW Women's title? While some might argue that she doesn't deserve a title match just after returning, Baszler is the kind of Superstar who could just walk in and demand a title match with little to no issues.
In fact, the Queen of Spades made her RAW debut earlier this year by attacking then-RAW Women's Champion, Becky Lynch. If nothing else, an ambush on Asuka would be a great way to reinsert Shayna Baszler into the title picture, help her make a statement, and get the feud going.
Female superstar says she inspired John Cena turning heel HERE
Maybe this might feel a little rushed, and it really is to a degree, but the Red brand has almost run out of credible opponents who could challenge Asuka for her championship. So, the two-time NXT Women's Champion may just be the right choice for the 2019 Women's Royal Rumble winner to feud against.
Whether Baszler should dethrone Asuka as RAW Women's Champion or not is a debate for another day.