This year is proof as WWE champion Brock Lesnar will be in the Royal Rumble match.
The simple formula of the Royal Rumble match was quickly hammered out and hasn't changed much over more than 30 years. However, there is always room for flexibility.
By now, we have likely seen everything WWE can think of for Hell in a Cell and even Money in the Bank, but Royal Rumble has undergone minor and major tweaks each passing year.
The time intervals have been bigger or smaller depending on how WWE wants to pace it. In 1995, it was only 60 seconds, but any given entrance, WWE could hold off more than 90 seconds or speed up the clock.
While 30 Superstars is the standard, it has consisted of anywhere between 20 in its 1988 debut and 50 in 2018's Greatest Royal Rumble.
People have gone all the way from the first entry spot to win it all and others have won from the last berth. Sometimes, one person gets on a roll and keeps the numbers small, while other events have 10 wrestlers in the ring before a single elimination takes place.
Despite being such an airtight formula, WWE is always finding loopholes and fun variations within the rules, which makes this match one of the most exciting and entertaining hours on the wrestling calendar.
Royal Rumble is a major event that simultaneously sets the tone for the rest of the year, kicks off the build to WrestleMania and offers a ton of fun along the way.
Anthony Mango is the owner of the wrestling website Smark Out Moment and the host of the podcast show Smack Talk on YouTube, iTunes and Stitcher. You can follow him on Facebook and elsewhere for more.