"Batman Vs Monster Joker" Batman: Arkham Asylum !!!

Batman returns to the botanical gardens and defeats Ivy, halting the rampaging plants. The Joker announces that the preparations for his party are finally complete and Batman travels to the asylum's visitor center to confront him. The Joker reveals he has recaptured Gordon and tries to shoot him with a Titan-filled dart; Batman leaps to Gordon's defense and is shot instead. Batman attempts to resist the change, and an upset Joker takes an overdose of Titan, mutating into a massive monster. In a makeshift arena on the building's roof, the Joker challenges Batman to a fight as Titan-induced monsters in front of news helicopters. Batman refuses to transform, uses the antidote on himself, and defeats the Titan-affected Joker and his henchmen. In the aftermath, those affected by Titan begin to revert to normal, including the Joker-who is taken into custody as police officers retake the asylum. Batman overhears a call about a crime led by Two-Face in progress and flies back to Gotham City in the Batwing. In a post-credits scene, a crate of Titan formula is shown floating in the ocean near the asylum when a hand surfaces and grabs it.