While Sasha Banks is indeed a four time women's champion, none of those title reigns were long lasting. Banks was called up to the roster at the peak of her career with prehaps being regarding by many as "the best women's wrestler" at the time due to her tremondous heel run down in NXT. However, Banks hasn't been able to recapture the same success on the main roster due to terrible booking for her and her character. Maybe the Boss losing Sunday was the final straw as she replied to a tweet Natalya sent out congratulating Charlotte for her win against Alexa Bliss.
Banks simply replies with "Let me come to blue". No word yet on whether Sasha truly feelings this way or not, but having Banks on the blue brand isn't a bad idea. It would create fresh match ups and prehaps creative can finally use "The Boss" character correctly.