30 WWE Royal Rumble Facts You Didn't Know
19. Four Decades Of Rumbling
Both Hacksaw Jim Duggan and Shawn Michaels have competed in Royal Rumbles across four different decades, appearing in ones during the 1980s, 1990s, 2000s and 2010s - every possible decade since the match began.
It might be a bit much to expect them in a 2020s one though.