This is what ChatGPT says when you ask what Ultra form Broly should have:
Creating an "Ultra" form for Broly—especially in the Dragon Ball context of Dragon Ball Super: Super Hero and Ultra Instinct / Ultra Ego era—means giving him a transformation or state that elevates him beyond even his current berserker rage. This form should retain Broly’s core themes of primal power and emotional intensity, but also evolve him strategically to match other top-tier fighters like Goku and Vegeta.
Ultra Wrath Broly (“Ultra Wrath” evokes both raw fury and a controlled divine elevation of his berserker nature.)
Concept / Lore:
Broly’s Ultra form is not based on serenity or ego—it’s based on mastery of primal instinct through emotion. He doesn't suppress his rage like Goku (Ultra Instinct), nor does he embrace destruction like Vegeta (Ultra Ego). Instead, he learns to harmonize his explosive Saiyan wrath with control, making him a warrior of unleashed, channeled fury. It’s the Saiyan apex of rage fused with control, like a natural predator not acting out of panic—but dominance.
Instead of ki draining or being hurt by overexertion, Broly gets stronger the more damage he takes—but now it’s strategic: He remembers attacks. He adapts mid-fight, like how he evolved against Gogeta. He gains temporary resistance/immunity to techniques that hurt him (like Frieza’s energy attacks or Goku’s teleport strikes). Think of it like Ultra Instinct's dodge + Ultra Ego’s damage power-up, but combined into a reactive learning combat mode.