#4 Nikki Cross vs. Asuka

With SAnitY on SmackDown and the next Mae Young Classic imminent, there's not much left for Nikki Cross in NXT, nor is she needed there anymore. SmackDown needs her far more, as it lacks a top heel in its women's division. The Carmella experiment has been an insulting and disastrous failure.
One of the casualties of that experiment, Asuka, is trying to rebuild herself by blasting through the IIconics. If Becky Lynch is any indication, that experiment worked, but it won't last for long.
Nikki, crazy woman that she is, will need a fight, and these two had one of the most memorable matches in the history of NXT's women's division with their last woman standing match. Before that, she fought Asuka to a draw at the peak of the Empress' power.
The blue brand would serve both competitors well by rekindling that magic. The SmackDown version probably won't be as crazy as its NXT counterpart, but it would get both women over when Asuka badly needs it and when SmackDown needs a top female heel.