#1. Roman Reigns
Roman Reigns announced that he was struggling with leukaemia back in October before he then took hiatus from the company, the former World Champion was holding the Universal Championship at the time and was then forced to relinquish it and it was later lifted by Brock Lesnar at Crown Jewel in November.
Reigns has recently been spotted on the set of Hobbs and Shaw where he portrays The Rock's brother and many reports now suggest that this could be a hint as to what the future holds for Reigns.
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Many believe that the star could now be well enough to return to the company in a smaller role and if Rollins isn't able to wrestle at WrestleMania 35 in a few months time then The Big Dog could easily step into his place and look to reclaim the title he never lost.