The Miz became the second superstar to cash in during a match, making said match a triple-threat match, and the first to cash in during a gimmick match. Sadly, he was also the fifth superstar to fail his Money in the Bank cash in and lose the match.
Charlotte Flair returned to action after six months of out of ring action following a kayfabe injury suffered from Nia Jax. She actually underwent another surgery on her breast implants.
The first TLC PPV that did not have separate tables, ladders, and chairs matches.
While The Miz was the third 2-time MitB contract holder, he was the first one to be successful on his first cash-in, but unsuccessful on his second.
Although The Miz unsuccessfully cashed in his Money in the Bank briefcase, 8 days later on Raw the contract and case was returned to him. Accordingly, technically Morrison cashed in for him, which nullified the cash in, so The Miz is the first WWE superstar to fully cash in his MitB contract and actually have (or join into) a match, but then have the contract returned to him on a technicality after being unsuccessful in the cash-in.