Why? Reigns sucks, Angle's a legend, and Finn/Styles is a dream match. The fun factor just tripled with this.
With Reigns out "indefinitely", major rewrites are under way for RAW
Also, the plan was for the five-on-three main event to go pretty long, now the plan is to give that time to Styles vs Balor.
http://rajah.com/node/58526