#2 Strowman wins, The Fiend attacks him post-match
As noted earlier, Bray Wyatt won't completely lose his momentum if he gets pinned by Braun Strowman at Money in the Bank. After all, it's The Fiend who has been the unstoppable one, not Bray Wyatt himself. But what would happen after Braun defeats Bray? WWE won't just end the feud there!
The entire purpose of The Fiend, as per Wyatt himself, is to hurt those who have hurt Bray in the past. He's here to protect him. In that case, it makes complete sense for him to step-up and save Bray from his former Wyatt Family member. The feud between Bray Wyatt and Braun Strowman is too good to be wrapped-up so quickly as it has the potential to impact both of their characters.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
One of the ideal finishes for the match is the Monster Among Men pinning Bray Wyatt, only for The Fiend to appear and attack him after the match. Of course, such a setting wouldn't have been possible in front of a live crowd, but that's one of the biggest advantages for WWE in these empty-arena shows. They can use the cinematic effect to portray Wyatt and The Fiend as two separate entities, with Strowman being completely shocked to see The Fiend.