At the royal Rumble, Final two in the ring are Seth and Dean.
Who is going to headline Wm against Brock? They both argue back and forth, but can't get a clear decision. In a dramatic moment, where one of them chooses that they are the one taking it for the team... They move away from each other... But unbeknownst to themselves... the other shield member is doing the same. They climb over the top rope. And hop down. At the same time. Double elimination.
So no clear winner, both Seth and Dean Win the Rumble.
Angle comes out... and decides tomorrow on raw, Seth and Dean team up in a 2 on 1 elimination tag match again The Beast incarnate himself, Brock Lesnarrrrrr.
The last member standing of the team Will be the one facing Brock himself for the title at wrestlemania.

NExt day, Paul comes out and decides that No... Brock will not face these 2 people, just to prove who has a bigger dick. They are clearly no challenge, and do not deserve facing brock.

After a couple of weeks back and forth between Heyman, Brock and Ambrose, rollins. It's not more turned into, Brock is just scared that these 2 members of the shield can beat him easilly.
Paul then agrees at the next PPV, Brock vs. Ambrose and rollins. Final man standing will face Brock for the title at WM... BUT! If they manage to Pin or Submit Brock before one of them is eliminated, That person gets the title there and then.

And well... after a 15 minute match, where neither of the guys gets eliminated they perform a 2 man shield powerbomb... And pin brock.
Rollins wins the title again, After performing a quick tag to ambrose.

Ambrose ofcourse unhappy about this decided to nag to Kurt, Showing that he and Rollins both won the Royal Rumble, and that He therefor deserves to have a titleshit at WM... For the Universal title.
And so it is set, Ambrose vs. Rollins for WM...
And ofcourse, Brock hates the shield so he wants to destroy Reigns. The final member of the shield available for that night.