The plot of Dragon Ball Super: Broly culminates in a battle of unprecedented scale. As Broly's power grows exponentially through his fights with Vegeta and then Goku, he quickly surpasses their Super Saiyan Blue forms. Frieza, seeking to push Broly even further, murders Paragus, which triggers Broly's emotional trauma and causes him to transform into a Legendary Super Saiyan. In this state, Broly is an uncontrollable force of destruction, overwhelming both Goku and Vegeta completely.
Realizing they cannot win alone, Goku and Vegeta retreat to Piccolo's location. There, Goku teaches a reluctant Vegeta the Fusion Dance. After two comical failed attempts (resulting in the fat and skinny forms of 'Veku'), they successfully merge into the supremely powerful warrior, Gogeta. Gogeta returns to the battlefield and engages Broly in a dimension-shattering fight. As Gogeta, in his Super Saiyan Blue form, prepares to deliver a final, lethal Kamehameha to the defeated Broly, Cheelai uses the Dragon Balls she had collected to wish for Broly to be sent back to the planet Vampa, saving his life. The hidden meaning in this climax is the triumph of empathy over pure power. While Gogeta's strength was necessary to stop the rampage, it is Cheelai's compassion that provides the ultimate resolution, breaking the cycle of violence. The film ends with Goku visiting Vampa, not as a victor, but as a potential friend, offering to help Broly learn to control his power. Goku's request for Broly to call him by his Saiyan name, 'Kakarot', signifies his acceptance of his own heritage and his recognition of Broly as a fellow Saiyan, not an enemy, setting a new, positive trajectory for a character once defined by pure rage.