6. Kenny Omega

Let's be clear about one thing; Kenny Omega signed a two-year contract with New Japan in 2017, so you WON'T be seeing him in a WWE ring until 2019.
Once that contract expires, however, there is a lot of speculation Omega will make his much-ballyhooed debut with the company. New Japan has booked Omega very strongly, and he is their current IWGP Us champion and just had a flagship match with Chris Jericho. In short, if WWE wants his services--and who wouldn't?--they're going to have to make him a very generous offer. WWE can pay more than New Japan, to be certain, but is the extra money enough for Omega to give up creative control of his character? We'll have to wait and see.
Look who just shut down all of Tony Khan's critics! More HERE.