The Miz should've won the MitB... :quite Anyways, I actually prefer a "Heel" to win the briefcase, so I'm going with either Baron Corbin, Jinder Mahal, or Kevin Owens. Both Luke Harper and Sami Zayn also have a slight chance of winning it too (but I doubt it).
Mojo will win and since Jinder will be champ at/after MitB (I'm predicting a triple threat w Jinder/Orton/Rusev. Orton RKOs Rusev only for Jinder to steal pin). You have Mojo cash in at Summerslam with Gronk cutting off Sing brothers for that mainstream blurb on TMZ.