#4 Natalya
Natalya's rumored heel turn over Ronda Rousey had begun to emerge the day she was declared her training partner. Every single fan and analyst sensed it and are waiting for it. The rumors were so rife that she was even the favorite to win the Money in the Bank contract and cash it in on the same night. However, Alexa Bliss did the needful.
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But now, things might finally come to fruition. Natalya's jealousy of being shadowed by Ronda Rousey might cost the latter her match at SummerSlam. Remember, she is a third generation superstar, and if it weren't for her, Ronda Rousey would not have learned a lot of moves in the Performance Center.
It might not be the perfect student-teacher rivalry pro-wrestling industry has seen in a long time. But, it would be the ideal feud to book Ronda Rousey if the company doesn't want the title to be around her waist.