>>110105612I was gonna say that the term 'Battle Royale' came from that one live-action Japanese movie, but after some research it looks like it initially came from historical boxing figure Jack Broughton, who codified boxing and made the 8-man last-man-standing gamemode called Broughton's Battle Royal. Then the phrase went largely out of use, being replaced with free-for-all and other substitutes, until WWE came up with the Royal Rumble, and then the aforementioned Japanese movie, Battle Royale.
