Tonight's edition of WWE RAW saw yet another shocking moment when Nikki Bella officially turned heel on Stephanie Vaquer, after she retained her Women's World Championship, beating Judgment Day's Raquel Rodriguez.After the Dark Angel defended her title, Roxanne Perez attacked her from behind. The Hall of Famer took her out, but in a shocking turn of events, she grabbed the Women's World Championship, hit Vaquer on the head, turned on her, lifted the belt, and ripped her red shirt, revealing her black heel signature shirt.In this article, we will look at three reasons why WWE turned heel on Nikki Bella on Monday Night RAW:#3. The newly crowned champion needed a storylineSince Stephanie was crowned the new Women's World Champion by beating IYO SKY, there hasn't been a notable competition for her; she has defended her strap a few times, but none have had a storyline.Bella and Vaquer were friends, and the Fearless One had already laid the foundation for a personal storyline of betrayal, putting the RAW women's division on notice.#2. Booking the Hall of Famer properlySince the former Divas Champion has returned to the sports entertainment juggernaut, she hasn't been used to her full potential and has lost multiple matches as a babyface.The creative team turning the Hall of Famer heel will open the door for them to book her properly on the flagship show to her fullest.#1. Given the stale WWE RAW women's roster, a new perspectiveWorld Wrestling Entertainment has seen multiple shake-ups in recent times; several major women on the red brand's roster have been sidelined for various reasons.Liv Morgan is out with a shoulder injury; Naomi, the former WWE Women's World Champion, had to vacate her title prematurely due to pregnancy.Bella, turning a heel and betraying the newly crowned champion Stephanie Vaquer, has given the stale division an entirely new perspective and would finally give it the push it needs.