#2 Naomi
Naomi finally achieve her goal of becoming the Women's champion last year. She held the title from WrestleMania up until SummerSlam when she lost it to Natalya.
Like a lot of people on the main roster after they lose a title, Naomi fell back down the ranks and hasn't done much since then.
So, why not give her another shot at the title. She a great wrestler and can be a threat to Carmella's reign as champion.
Naomi would have to develop a little more in the mic department as Carmella is the better talker, but this would be a great feud to see.
If the match ever did happen, it'd be a nice change to the title scene, even if it ends up being one match or two.