#4 Brock Lesnar
Well, here we have your obvious choice of the list. Brock Lesnar and Paul Heyman have sung their triumphant song of victory, ever since that shocking, streak-ending win over The Undertaker at Wrestlemania 30.
That victory was substantial enough to carry Brock for the last three years. There is a very high degree of possibility that we could see The Undertaker, Goldberg, as well as Brock Lesnar all in the same ring, at the very same time, during the Rumble match. That mental image alone should give fans goose bumps.
I'm sure that most of Lesnar’s focus will be on Goldberg, during this match. However, don't think for a moment that The Beast Incarnate will pass up the opportunity to put one more over on Taker. If in fact, Brock does eliminate The Undertaker, it would give him a tonne of momentum as he moves forward, towards Wrestlemania 33.