Out of the fifty entrants at the Greatest Royal Rumble, there were members of the Smackdown, Raw, 205 Live, and NXT rosters. There were also some entrants making their return to a WWE ring or entering for the first time. Before the event, names like Mark Henry, Rey Mysterio Jr, Great Khali, and Chris Jericho were announced but others were unannounced surprises.
#5 Mark Henry - His first match since the Andre the Giant Memorial Battle Royal at WrestleMania 33.
#7 Hiroki Sumi - A professional Sumo wrestler making his WWE debut.
#12 Hornswoggle - His first match on a WWE broadcast since 2014.
#24 Tucker Knight - from the NXT tag team Heavy Machinery.
#28 Rey Mysterio - First appearance since Royal Rumble match in January. The two Royal Rumble appearances have been his only WWE matches since 2014.
#34 Roderick Strong- NXT Tag Team Champion
#37 Babatunde - NXT wrestler and former professional football player.
#40 Dan Matha - NXT roster member
#45 Great Khali- First WWE appearance since interfering in Punjabi Prison match at WWE Battleground in 2017. First WWE match since 2014.
#50 Chris Jericho- First WWE match since July of 2017.