The world thought the age of cosmic war was over. Thanos was gone, the multiverse stabilized—at least for a moment. But peace shatters when a rip in the very fabric of reality opens above Earth, releasing a being older than time itself: Atropos, the Harbinger of the End, wielder of the Doomsday Engine. This ancient weapon doesn’t just destroy worlds—it erases them from existence, rewriting history as if they never were. As cities vanish from memory and timelines collapse, the remaining Avengers are forced to assemble a new roster that spans every corner of the multiverse. Old allies return, unlikely heroes rise, and the stakes eclipse anything they’ve faced before: stop Atropos, or watch reality unravel into nothing.
Captain Marvel leads the charge alongside Doctor Strange, who warns that using the Doomsday Engine will trigger a chain reaction capable of collapsing every universe at once. Sam Wilson’s Captain America becomes the team’s moral compass, rallying fractured heroes after early missions end in disaster. Wanda Maximoff, long thought lost, emerges from the shadows, torn between seeking redemption and wielding her unmatched chaos magic to end the threat—at the risk of becoming it. Meanwhile, Tony Stark’s legacy lives on through Riri Williams, whose genius engineering may be the only way to dismantle the Engine. But as Atropos tears through timelines, the Avengers learn the most chilling truth: in several alternate futures, they’ve already failed.
The war spans realms and realities—battles rage on the ruins of a destroyed Asgard, in the void beyond the Quantum Realm, and inside a collapsing New York that flickers between centuries with every heartbeat. Loki’s knowledge of temporal manipulation becomes essential, forcing him into an uneasy alliance with Thor and the Guardians of the Galaxy. Each victory costs dearly; every loss reshapes the battlefield. As Atropos edges closer to fully charging the Doomsday Engine, the Avengers discover his true goal: not destruction for power’s sake, but liberation from an eternity of existence. To him, the erasure of all is an act of mercy. Confronting him means facing not just his armies, but the philosophical question—should the fight be to save everything, or to let it all end?
In the cataclysmic finale, the Avengers launch a final assault on the heart of the Engine, a fortress anchored between dying universes. Doctor Strange and Wanda hold back collapsing realities while Thor, Captain Marvel, and Hulk battle Atropos in a storm of cosmic energy. Riri Williams risks her life to dismantle the Engine’s core, triggering a chain reaction that threatens to consume them all. In the final moments, one Avenger makes the ultimate sacrifice, severing the Doomsday Engine’s power and sealing the rip in reality—at the cost of being erased from memory in every universe. As the dust settles, the surviving heroes stand in a repaired but subtly altered world, where they can’t quite remember who’s missing… only that they owe them everything. The screen fades to black, the words “The End…?” lingering like a challenge.
