#1. Murphy wanting revenge on Seth Rollins
Murphy is very much a man with nothing left to lose after being disowned and destroyed by his Messiah, Seth Rollins. He could now be out for revenge. Furthermore, he has to be trying to find a way to redeem himself in the eyes of the WWE Universe.
If nothing else, the best way to do that would be to go right after Seth Rollins, which seems like the most likely option at this point. In fact, after being beaten around, yelled at and left in shambles last week on RAW, Murphy deserves to get his momentum back and exact some kind of revenge..
Interestingly enough, getting revenge on Rollins might mean Murphy has to join forces with the Mysterio family. It might even help result in the aforementioned relationship storyline between Murphy and Aalyah, which would be fun to watch play out.