#3 Heel Turn - Asuka

Asuka was the longest-reigning titleholder in NXT history. Her reign of over 500 days was unprecedented at the time and was something that predicted major future success when she moved to the main roster.
While she did have an undefeated streak to start her main-roster tenure, it was ended at WrestleMania 34 when she lost to Charlotte Flair. After that, Asuka sort of fell down the card a bit but still maintained an aura of danger as one of the most feared women in WWE.
Her tag team with Kairi Sane, albeit a good idea, has been a bust because of the lack of TV time dedicated to the titles. Asuka needs a big change to return to the top of the card, and a heel turn is the way to do it.
She could easily attack Bayley or even her partner Kairi Sane because both are so darn lovable. An arrogant Asuka is a dangerous Asuka and could be done closely to how Io Shirai's turn has been handled in NXT.