So I saw an interesting point brought up somewhere. Samoa Joe has a ready-made title feud coming up soon. Hideo Itami has been teasing that he is close to returning and in story, they accounted for his injury by having him be attacked by an unknown assailant in the parking lot way back at Takeover: Unstoppable. It has long been assumed that if they ever revisited that story that Balor would be the one who did it, but it so happens that Joe debuted that night as well and ever since he showed up, he has always been intent on winning the title above all else, so he attacked Itami because he wanted to eliminate the guy he felt was most dangerous.