#1 Baron Corbin costs Team Raw

Baron Corbin finds himself in an incredibly tricky situation on Sunday night. If Team Raw wins the match, he then has to face Braun Strowman in a stipulation of Strowman's choosing, whereas if they lose the match, he has to face the wrath of Stephanie McMahon and lose his position as Constable/GM of Raw. Basically, Corbin is screwed either way.
So there is every chance that Corbin decides disobeying Stephanie McMahon is better than anything Braun Strowman may have in store for him and strikes himself a deal with Shane McMahon.
This could set up a longer storyline for Strowman and Corbin, with The Monster Among Men finally getting his hands on Corbin at Mania. It could also help SmackDown neutralise one of the biggest threats on Sunday night in the form of Braun Strowman.