#3 Natalya
Natalya and Ronda Rousey have been billed as best friends ever since the latter arrived in WWE this past January, which can only mean one thing: there's a betrayal coming at some point. Does that mean that it's imminent? Perhaps, but whether or not it happens immediately doesn't matter, as it's almost a guarantee that it'll happen at some point.
I guess the biggest question is does WWE want to turn Natalya heel so quickly after her father's unexpected passing? My guess is no, but it's obviously just a guess. Angle's tend to have an incredible impact when the people aren't expecting him, so if Natalya does end up backstabbing Rousey on the post-Raw SummerSlam, it'll definitely be a shocker, which is why WWE might do it.
But, in the end, WWE will probably continue on with the friendship storyline between the two, as they'll likely want to have someone in Rousey's corner when she takes on Nikki Bella this coming October.