The Royal Rumble match is traditionally one of the most chaotic, unpredictable matches of the calendar year.
While the winner of the huge 30-man over-the-top-rope Battle Royal may not be in great doubt most years, the surprise entrants, outstanding and unexpected performances and emotional returns have captivated audiences for the better part of 27 years.
Everyone from Hulk Hogan to Bob Backlund to Bret Hart and John Cena have supplied fans with moments and performances that have defined the event.
This year's event, emanating from the Consol Energy Center in Pittsburgh, is sure to be no different.
Superstars such as the aforementioned Cena, Daniel Bryan, CM Punk, Randy Orton, The Shield and the Wyatt Family are certain to make their impact felt. What surprises will they and WWE have in store for fans in the Steel City, and where will those moments rank among the greatest of all-time?
Only time will tell.
In preparation for the first stop on the road to WrestleMania, here is a look back at the biggest surprises in Royal Rumble history.
The surprises are listed chronologically. Feel free to express your views as to which surprise is the greatest in Royal Rumble history in the comments section below.