#1 Braun Strowman destroys everyone
If character motivation means anything to WWE, TLC should be a playground for Braun Strowman. The Monster Among Men just wants to destroy things and he might do just that at TLC.
The Bar, Kane, and The Miz could be able to help, but it would be Braun Strowman's sadistic mind and brute strength that really dominates over Ambrose, Rollins, and Reigns. He could single-handedly lay waste to his opponents, leaving them twisted in a sea of busted tables, ladders, and chairs. This kind of treatment would be a nice receipt for that Shield Powerbomb through the announce table on Raw.
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This kind of booking would not only make Braun Strowman look like a monster, but it would also give The Shield someone to carry on a feud with. A gauntlet match featuring Strowman vs The Shield could help continue that rivalry later on.
The Shield would likely wind up victorious in the end but WWE needs to protect Braun Strowman's real estate because it would be a shame to squander his massive popularity by continually booking him to lose in big match situations.
If The Bar does separate at TLC, at least fans can remember the good times and look forward to these two brutes possibly locking horns once again.