Goku and Hearts struggle against the newly-empowered Frieza and Cooler, until their battle is interrupted by the arrival of the alternate Broly in his Legendary Super Saiyan form. Broly attacks all four combatants, overpowering them all, as the masked Saiyan looks on. Suddenly, a mysterious cloaked figure arrives on the scene and attacks both Cooler and Frieza, removing the Dark Dragon Balls from both of them. (thetvdb.com)