Alien Invasion; we come in peace: Oddly dressed men in all black show up in stadiums worldwide

Could it be an impending alien invasion, another yet conspiracy theory or a very effective campaign ad slash publicity stunt. The world has been in a fix about these  men showing up in stadiums wearing black robes with a biohazard logo emblazoned on it and carrying a banner labeled ' #WinnerTakesEarth '

Could it be Aliens are gambling to take over planet earth, but i stronglt bet this an ad campaign