#4 Brock Lesnar appears and beats down Seth Rollins
Let's face it, Roman Reigns' return has actually affected the match between Brock Lesnar and Seth Rollins adversely. Currently, there's no hype or momentum attached to the match and what was supposed to be a battle against adversity for Seth Rollins to reach the ultimate prize in WWE has taken a backseat, as he's now focusing on reuniting with his brother and getting the "band" back together.
Instead, shouldn't the focus be on the biggest match of his career against an opponent that has dominated everything in his path?
Fastlane can provide a great opportunity for a reboot, as after the match we could see Brock making an appearance and beating up Seth Rollins just to remind him of what's in store at WrestleMania. This would help reignite the feud as well as generate some momentum for the match.