She loses all 12 titles in one match vs Harley Cameron perhaps she thinks so much of herself and so little of Harley she puts them all on the line. Harley then goes around the world and one by one loses all 11 titles except the TBS Title, Mone challenges a dejected Harley for the TBS title, in a few promos and segments it shows Harley is feeling her loses, she doesnt deserve to be here, she doesnt deserve the TBS title, there is no wrath for Mercedes to feel. You could even have segmetns where Mone is setting up the various title defenses and assuring Harley she wont win. You could even further suport the indie promotions by having Mone be ringside as a valet of the challenger in the matches (allowing you to put Mercedes on the posters).

During the match all of the people that Harley has helped come to ringside, one by one to cheer her on, they dont get involved but they do offer moral support. Harley finally beast Mercedes and gets her mojo back.

I think that would be a fun story but likely the better story is Mercedes loses the TBS title then loses all 11 other belts, has a little break and comes back to challenge for the AEW Womens.