It is believe Nikki Bella took the title off of Beth Phoenix so Kharma could return, get the belt without having to face Phoenix, as WWE wants to save that match. This would also continue the Kharma/Bella Twins storyline that began last year before Kharma left.
According to F4Wonline.com, the original plan was for Nikki Bella to win the title at Extreme Rules and then Kharma return the next night. It seems she will still return in the near future. There is no official word on Nikki and Brie Bellas contract situation and if they are re-signing with WWE or not.
Genial.