#5 SmackDown Women's Championship: Becky Lynch (c) vs. Nikki Cross

The image you see above is from a recent SmackDown Live house show. Nikki Cross' appearance there is probably a sign that a call-up is coming following SummerSlam.
If there's justice in the world, Becky Lynch will end Carmella's horrific reign as SmackDown Women's Champion at SummerSlam. However, there's a shortage of heels on the brand to challenge her. She's just beaten them all, and none of them are that credible. There are really only two possible answers - either Asuka or Charlotte turns, or someone comes up from NXT.
With SAnitY causing chaos on the blue brand, there's no better time for Nikki to come up, and she can insert herself into title contention quickly.
The clash of styles at this event would make for some fun indeed.