#2 Dean Ambrose turns on The Shield, the heels win
I know that deep down inside, every one of you considers this to be a possibility. And this is because you know that WWE wanted to tell a story with Dean Ambrose's heel turn, and the story only got told halfway owing to Roman Reigns falling ill. Now that Reigns is back, the story could potentially kick off at full blast again.
The fact of the matter is that Dean Ambrose's future with the company is uncertain. WrestleMania 35 could very well be the very last time that Ambrose works for WWE as a performer. So, the company may certainly want to send The Lunatic Fringe away in style.
And we also know that Dean Ambrose and Roman Reigns are best friends backstage, so Ambrose may want Reigns to do the honors. It is to be noted that neither Reigns nor Ambrose has a WrestleMania match yet.