#2 The Rock
At WrestleMania 31, The Rock and Ronda Rousey took Triple H and Stephanie McMahon out. If you check out the comments on our Facebook page, you'll know that a majority of our readers want The Rock to return and team up with Rousey, to take on The Authority.
Of course, The Rock has film commitments outside the ring. So this possibility only applies to whether or not he'd be free to come and shoot during WrestleMania. However, in our opinion, he would have been the dream partner for the MMA superstar, by far.
It would have been the final chapter of a story that began at WrestleMania 31. WWE is not often known for continuity, but The Rock's presence would have ensured that a long-term storyline was reaching its logical grand finale.