Where is Nikki Cross? 3 Possible Storylines

#1 Is she a surprise entrant Smackdown?

Nikki Cross launching at Ruby Riott

The simplest answer is that she is waiting to debut. Maybe the idea is to have Sanity debut as a three-man team and face off against the New Day, the Shield, or sloppily arranged three-man teams (let's admit it, they throw three baby faces together constantly).

So maybe the idea is to have them start a rivalry with another group and come to a Stalemate only for Nikki Cross to return and tip the scales in the favor of Chaos. This would also give her the opportunity to go against Carmella, the IIconics (who she has worked with many times), Asuka (another favorite of hers, Charlotte, Becky Lynch and more!)