Batman Unlimited: Mechs vs. Mutants

Damian fails to stop the Joker and tumbles from a building, but Batman pulls him to safety. A video blogger captures the moment and posts it online, spreading the incident across the city. Damian is left to confront the fact that he still has a lot to prove in his new role.

Alfred Pennyworth reassures him that he is still learning and growing. Damian would rather speak with someone who has walked the Robin path, since his fellow trainee is away with his team. The moment highlights Damian's doubt and his longing for guidance.

Deep in the Arctic, the Penguin remains exiled with Mr. Freeze and Buzz. Freeze uses a device to mutate an isopod into a gigantic monster that attacks oil drillers near his ice cave. The creature is eventually defeated, but the encounter plants seeds for Penguin's next move.

The Penguin sees a path to power in Gotham and urges Freeze to return with him. He promises shared control and the chance to manipulate events from the shadows. Freeze considers the proposal as the duo plans their next move.

Bruce Wayne and Damian attend a technology showcase at Wayne Tower where Dr. Kirk Langstrom reveals a drilling mech capable of melting rock. The potential breakthrough draws attention, but Bruce receives a call from Alfred about an attempted break-in at Arkham Asylum. Green Arrow is present and follows the group as they depart.

At Arkham, the Penguin and Freeze drill into the asylum and free Bane, Chemo, Killer Croc, and Clayface before escaping. The breakout destabilizes the facility and sets in motion the villains' plans. Batman and Robin sense the danger but arrive too late to stop the escape.

Back at their undersea cave hideout, Freeze uses Bane’s Venom, Clayface’s protoplasm, and Chemo’s toxic waste to create a serum that mutates Killer Croc and Chemo into gigantic ice monsters. The creatures join forces to threaten Gotham as they rampage through the city’s outskirts. The mutagenic mixture signals the scale of the threat that the heroes must counter.

While returning to the city, Batman and Robin spot the mutated monsters and attempt to intervene, but are unable to stop them in time. The oncoming crisis forces the heroes to rethink their approach as the mutated threats spread. The failure becomes a turning point for Damian’s resolve.

Freeze and Penguin turn on each other, each seeking control over the plan. Buzz the penguin steals samples of Freeze's mutagen, worsening the chaos. Bane and Clayface use those samples to mutate further and grow more formidable.

Despite warnings about the serum’s effects, Freeze is defeated and Penguin dispatches Bane and Clayface after Batman. The battle reaches a fever pitch as Lava-Clayface emerges as the most dangerous threat yet. The city braces for a last stand against the growing ice-infused menace.

Batman hands the key to the Batmobile to Robin and instructs him to distract Lava-Clayface while a giant Bat-Mech is retrieved from Wayne Enterprises. Green Arrow arrives, revealing that Langstrom built an Arrow-Mech for him after a contract with Queen Industries for research and development. The sudden backup shifts the odds in the heroes’ favor.

Batman moves to confront Croc and Bane, while Green Arrow tackles Chemo. Langstrom’s insight helps the team forge a plan to counter the mutations and restore balance. The combined effort marks a turning point in the battle against the mutated threats.

The Flash and Nightwing join the effort, lending speed and agility to the mission. They work with Batman, Green Arrow, and Langstrom to assemble a powerful laser cannon that can counter the mutated creatures. The makeshift weapon becomes central to turning the tide of battle.

With the heroes’ plan in motion, the monstrous foes are returned to their normal forms and subdued. The Penguin, along with Buzz, is captured by the Bat-Mech, while Freeze is taken into custody. Batman’s team secures the city and reassures the public that order has been restored.

In the aftermath, Penguin and Freeze are arrested and sent back to Arkham, Buzz is placed in a zoo, and Langstrom begins repairing and upgrading the mechs for future incidents. The other heroes depart the Batcave as Batman praises Damian for the growth he has shown. Yet Clayface secretly escapes his ice prison and slips away into the sewers.