#2 In order to control his own monologue
Seth Rollins is now in the dangerous position where he can either turn heel himself as part of his match with Bray Wyatt and retain his Championship or become a heel because he's retained the title.
The WWE Universe has turned a number of stars heel in the past, the most recent being Batista when he attempted to return to WWE as a face but the crowd was having none of it. Rollins has reached the peak of his career in WWE but he's been pushed so hard throughout the last few months that many fans have had enough.
Bray Wyatt has worked hard to create something new, is fantastic on the mic and he has proved that he is one of the most creative stars on the roster so it could be time for Rollins to move aside before he becomes another star that's cast out by the WWE Universe.
Rollins has been heel before and he's a fantastic heel, so he could decide upon this, but if he doesn't then he could be looking at a tough few months when he tries to gauge a reaction from the crowd.