#4 Dolph Ziggler and Sonya Deville ruin a cash-in attempt on SmackDown
Yes, Otis has the Money in the Bank contract, and chances are, based on how popular he is, it is only a matter of time until he becomes the face of SmackDown by capturing the WWE Universal Championship. But Dolph Ziggler and Sonya Deville have formed quite a formidable alliance on SmackDown as well and they will do everything in their power to ensure that Otis does not manage to capture the title.
Charlotte Flair to return and wrestle a CURRENT CHAMPION?
So, let's imagine a situation where Braun Strowman has been knocked down and Otis is about to cash in his contract. Ziggler and Deville could show up out of nowhere and this could eventually lead to them costing Otis a chance to cash in his contract. And this could start a mixed tag team feud that stretches out for many months at a go, in my opinion.
Otis vs. Ziggler is a feud with enough steam to be a central storyline on SmackDown long after the resolution happened at WrestleMania, because of the strength of the storyline itself.