#4 Having John Cena pass the torch to him
Despite the protestations of the WWE Universe, John Cena has carried WWE on his shoulders for many years. He's been the face of the PG Era, leading WWE to new heights in terms of stock prices with a healthy dose of family-friendly entertainment. He was the undisputed face of the company until Hollywood happened. And then, Reigns came along.
Cena passed on the torch to Reigns during their match at No Mercy last year. He has to do something similar with Rollins to prove that he is the new guy and not Reigns. This is, provided, WWE comes to its senses and realizes the value of The Architect.
SummerSlam this year could be the ideal stage for something like this to happen. Rollins is red hot right now and as we've seen in the past, he has incredible chemistry with John Cena.