The killer bunny in Monty Python's Holy Grail movie yields immense power and can decimate tens of knights in a matter of seconds. The protagonists used a holy hand grenade to get past the bunny. It is known that bunnies breed extremely quickly. Given these facts, write a short movie plot for an alternative apocalyptic universe where the bunny hasn't been killed and now poses an existential threat to the whole mankind. No holy hand grenades or holy atomic bombs or anything else holy allowed.
The following is a brief plot for the scenario you described:

In a post-apocalyptic world, killer bunnies have taken over. A group of unlikely heroes must band together to stop them.

The film opens with a montage of news reports and social media posts showcasing the devastation caused by the mutated killer bunnies. Humanity is losing the battle, with entire cities falling to the fluffy menace. Governments have collapsed, and people are forced into hiding to avoid the relentless attacks.

A diverse group of survivors come together, each with unique skills and knowledge, to form a resistance against the killer bunnies. Among them are an eccentric biologist, a brilliant engineer, a fearless warrior, and a cunning strategist. As they work together, they uncover ancient texts that detail the origins of the original Killer Bunny and reveal a potential weakness.

The resistance learns that the bunnies have a vulnerability to a rare herb found in a remote part of the world. The group embarks on a perilous journey to gather enough of the herb to create a weapon that can neutralise the bunny threat. Along the way, they face treacherous terrain, rogue bands of survivors, and terrifying encounters with the bunnies.

Upon returning with the herb, the engineer designs a device that can disperse the herb as a gas, rendering the killer bunnies harmless. The team devises a plan to infiltrate the heart of the bunnies' territory to deploy the weapon. In a thrilling climax, the resistance faces overwhelming odds, but through their bravery, teamwork, and determination, they manage to activate the device and release the gas.

The deadly bunnies are rendered harmless, their threat neutralized. Survivors around the world rejoice and begin the long road to rebuilding. The film ends on a hopeful note, as humanity comes together to create a better future, forged in the crucible of adversity.

Let me know if you need further revisions to the plot.
Add titles and subtitles to improve the clarity of the plot summary.
Sure, here is the plot summary with titles and subtitles:

**Title:** Killer Bunnies: The Movie

**Subtitle:** A Post-Apocalyptic Adventure

**Opening Montage:**

* News reports and social media posts show the devastation caused by the mutated killer bunnies.
* Humanity is losing the battle, with entire cities falling to the fluffy menace.
* Governments have collapsed, and people are forced into hiding to avoid the relentless attacks.

**Act I:**

* A diverse group of survivors come together to form a resistance against the killer bunnies.
* Among them are an eccentric biologist, a brilliant engineer, a fearless warrior, and a cunning strategist.
* As they work together, they uncover ancient texts that detail the origins of the original Killer Bunny and reveal a potential weakness.

**Act II:**

* The resistance learns that the bunnies have a vulnerability to a rare herb found in a remote part of the world.
* The group embarks on a perilous journey to gather enough of the herb to create a weapon that can neutralize the bunny threat.
* Along the way, they face treacherous terrain, rogue bands of survivors, and terrifying encounters with the bunnies.

**Act III:**

* Upon returning with the herb, the engineer designs a device that can disperse the herb as a gas, rendering the killer bunnies harmless.
* The team devises a plan to infiltrate the heart of the bunnies' territory to deploy the weapon.
* In a thrilling climax, the resistance faces overwhelming odds, but through their bravery, teamwork, and determination, they manage to activate the device and release the gas.

**Conclusion:**

* The deadly bunnies are rendered harmless, their threat neutralized.
* Survivors around the world rejoice and begin the long road to rebuilding.
* The film ends on a hopeful note, as humanity comes together to create a better future, forged in the crucible of adversity.

I hope this is what you were looking for. Please let me know if you have any other questions.