The Rock proved ring rust is just a myth on Saturday -- returning to the squared-circle for the first time since 2016 at WrestleMania 40 ... and ending the epic match with the win!!
The Final Boss and Roman Reigns paired up against Cody Rhodes and Seth "Freakin'" Rollins in a tag-team match to cap off WWE's first night of festivities ... and the whole thing was fireworks from start to finish.
In fact, action broke out outside of the ropes numerous times .