Regarding John Cena winning the WWE World Heavyweight Championship at Money in the Bank, it's now being reported that Cena was virtually certain to win it at MITB all along, ever since Bryan was stripped of the Title due to his injury. There was some speculation that perhaps another Superstar would win the Title, but Cena was reportedly locked in to win it all along.
As seen on last night's episode of Monday Night Raw, Triple H threatened John Cena by saying that he had a "Plan B", which prompted Seth Rollins to come out with the Money in the Bank briefcase behind Cena on the entrance ramp. Although it may have appeared as though Triple H was referring to Rollins and the MITB contract, it's being reported that Triple H's "Plan B" could turn out to be "The Beast" Brock Lesnar.
There's been a lot of speculation over the past few days that a Title match between Cena and Lesnar could eventually take place, possibly at SummerSlam.