#4 The Undertaker
The Undertaker is an icon and a legend in the WWE, but it seems like his career is winding down and we may not see a lot of him in the ring.
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Many reports have suggested that he may wrestle his final match in the WWE later this year at WrestleMania. The Royal Rumble shouldn't be on the list of matches that The Undertaker should compete in at this stage of his career, and it would not set-up any notable storyline.
The Undertaker's character has to be the center of any storyline, but with 29 other men in the ring, it is almost impossible for one Superstar to stand out in a Royal Rumble match.
I believe that The Undertaker should have just the one match at WrestleMania, maybe against a younger talent that he can put over, and that should be the end of his storied wrestling career.