Ambrose wins MITB and Rollins/Reigns trade off the title until a final match at SummerSlam. Everyone assumes Ambrose will cash in on the winner, instead he makes it a triple threat (following Rollins' cue) but because he's a lunatic he does it before the match even starts. He cuts a promo saying he needs to prove himself against both of them or he's nothing and blah blah blah. If he wins he gets the biggest pop.