#2 Ruby Riot
Ruby Riot is another NXT option here, and she's probably a more realistic bet than Asuka. Calling the Empress of Tomorrow up to the main roster would call into question the fate of the NXT Women’s Championship, while Riot has no such complications.
Riot being called up would be one of the fastest ascents to the main roster ever. She signed with WWE in January but didn’t make her debut until March 22 when she showed up to help neutralise Nikki Cross.
It would be an impressive rise, but it’s definitely not out of the question. It doesn’t seem like anyone is going to take the title from Asuka right now, and if it’s going to be anyone, it will probably be Ember Moon. That leaves women like Ruby Riot, Nikki Cross, Peyton Royce, and Billie Kay without much to do.
Those other women would be candidates to move up as well, but it wouldn’t be as easy. If Cross were to move up, what would happen to the rest of SAnitY? As for Royce or Kay, they would probably have to be moved up together, which may not be in the cards right now.
Riot coming to the main roster is the easiest call-up SmackDown could make right now, and she would add a unique dimension to a women’s MITB match.