Let's face facts.
ASUKA WILL WIN THE WOMEN'S RUMBLE!
Why? Because I don't see it being that someone they have built up for three years, and emphasised her unbeaten streak, would lose it in a Royal Rumble Match.
A loss is a loss. If Asuka goes out of the Rumble, her streak is over.
What I would have preferred is this:- A few weeks ago, there was a match on RAW, between Alexa Bliss and Asuka. Asuka beat Bliss, but it was a non-title match.
I would have preferred it be for the title, and Asuka win it then. Why? Because, as champion, she wouldn't be in the Rumble anymore, meaning that the winner is less predictable. If Asuka isn't in the Rumble, then it's anyone's to win. With her in, there is only one winner.
With no Asuka in the Rumble, then even a Smackdown Diva could win. RAW have the Elimination Chamber this year, so I would have Asuka as RAW champion, a SD Live Diva win, and Asuka's challenger win a Divas Elimination Chamber. But not having Asuka as champion means that both the Divas RR AND a Divas EC are predictable.
Putting the title on Asuka early keeps her undefeated, and also elevates other talent, so that the challenger looks strong against her at WM34.
This is why I am not a great fan of winning streaks. It makes matches predictable, and locks things up, especially if they win the title.
I think undefeated Streaks work best with monster heels. For example, emphasising Andre The Giant being 15 years undefeated made Hogan beating him at WM more of a big deal. It should seem like an insurmountable challenge to end a Streak, and a face champion beating an unstoppable force tells a better story, than a heel toppling an undefeated face.
An undefeated Streak should be used to put "the top face" at the top, and finally reach the summit, or overcome their greatest challenge, or elevate a future star, which they can use to brag about for years (like Jericho brags about beating Austin and the Rock in one night).
Also, having an undefeated streak means that the "right" person has to beat them. Goldberg's Streak seemed to deflate when he finally lost to Kevin Nash, because Scott Hall tazered him. Brock was the wrong guy to end Taker's Streak, and I feel that any Diva who beats Asuka will cop heat (and not the proper kind) unless it is someone akin to Rhonda Rousey beating her (and that's who I am tipping will finally topple Asuka).