#1. Edge
This is based on the report from Mike Johnson of PWInsider.
PWInsider had also reported in October that the Hall of Famer was in Pittsburgh, which is where WWE medical head -- Dr. Joseph Maroon -- is headquartered, for company-related business. The 11-time WWE World Champion had previously shut down rumors of an in-ring return, but it is not uncommon for wrestlers to work the fans to protect the true value of a surprise.
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Mike Johnson's "gut feel" has been that Edge could return at the Royal Rumble. If anything, SummerSlam 2019 was an indication of it as he speared Elias, getting some in-ring action for the first time since his retirement.
That was a much bigger step than we realized and if Edge is to be the big surprise entry, he should be the one to eliminate Lesnar, even if he doesn't go on to win the whole thing.
Edited by Habil Ahmed Sherule