#2 Brock Lesnar
Brock Lesnar's contract is supposed to end this year in April. The hottest soon-to-be-free-agent who juggles between UFC and WWE will most probably not renew his contract. According to the publisher and editor of the Wrestling Observer Newsletter Dave Meltzer, Lesner may not renew his contract and might go on to face Bobby Lashley. Also, President of UFC Dana White has posted a picture of him with Lesner, shrewdly indicating that the Beast Incarnate might join UFC.
The distributor of one-way ticket to Suplex City has defeated almost all the big names of WWE. He has competed against John Cena, Goldberg, CM Punk, The Rock, Hulk Hogan and he also broke 'The Streak' of The Undertaker. His exit from WWE speculated to occur after WrestleMania 31, but after which he signed a 3-year contract with WWE, breaking those speculations. This time there are high chances that he might move on to UFC.
Because of his part-time nature, his departure might delight a part of the universe. Their main complaint against him is that he appears only before main PPV's and then disappears for the rest of the year and as he is the champion, the Championship has become stagnant. But this does not deny the fact that he has a huge fan following and also of his capability of putting up amazing matches.