#2. Legitimate opponent to neutralize AoP
AoP is a physically imposing tag team and Seth Rollins couldn't have a better choice of bodyguards. Their physical stature and numbers mean that they can dominate anybody in sight and Kevin Owens and Samoa Joe know that firsthand.
While it still would have been nice to see a full-time opponent in that spot, not many logically made sense to fill that role. A smaller superstar wouldn't have been as good a look and when Kevin Owens affirmed his confidence in their partner after seeing him in the dark room, it was clear that it was going to be someone with big physical stature.
And the crowd loved every bit of it. From once getting "please retire" chants 5-6 years ago, he ended up getting a big chant for a hot tag. While it may not have made much storyline sense for the alignment, it still worked out successfully.