#2 Stephanie McMahon wins MITB

Stephanie McMahon versus Ronda Rousey at SummerSlam is one of the prevailing rumors going around in WWE right now, which means that The Money in the Bank pay per view could be the catalyst to get to that point. Not only would it allow McMahon to cash in on Rousey if she wins the title at MITB, but it would also ensure Rousey doesn't look weak in the process.
As for how McMahon could win the briefcase, maybe she is able to talk one of the other Raw superstars into aligning with her and helping her win the match. McMahon could offer the superstar a future title shot in return, which would allow the heel superstar to eventually turn babyface once she realizes that McMahon was just using her.
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Of course, there are probably a plethora of other ways to set the feud up between Rousey and McMahon, especially since McMahon has already involved herself in the feud between Jax and Rousey, but McMahon winning the briefcase would be the ultimate way to create a surprise, gain a massive amount of heat and put the two women on a collision course for SummerSlam.