Hah, see, you're lucky we got history.
(And probably for the matchup, because it's a total dream match, but Asuka's still crazy over. So is Charlotte. It's a similar reaction to Shinsuke challenging AJ.)
I have no idea what they're gonna do with Carmella's MITB and I'm not sure they do, either. Personally, I'd love it if they teased her cashing in on both Nia and Asuka after their wins and then chickening out. Carmella's awesome at being out of her league, I mean that sincerely. Her scream-and-flee when Asuka entered the women's Rumble was amazing.
But that still leaves the question of what to actually do with that case. Cornette suggested a MITB scenario where a face gets sick of the heel holding the case over his head, and appeals to an authority figure to force them to make the title match where the heel can get theirs. A variation of that would actually work here. Say Carmella keeps trying to cash in, but every time she thinks Asuka's softened up enough after a match, she realizes, oh crap, Asuka's back up, RUN. And then the deadline comes, and she's forced to cash it in with advance notice at a Smackdown PPV. So she's stuck in a nightmare scenario but puts up her best fight, and even though she loses, she earns some respect. For a comedy heel verging on face, that's probably the best scenario.