With the final incursion crashing the Marvel Universe and the Ultimate Universe together, Doctor Strange, Doctor Doom, and Molecule Man stage one final fight against the Beyonders. Meanwhile, the two Earths begin a massive battle against each other, heroes on both sides dying as the two worlds collide. The Master and Mr Fantastic manage to save a number of people on special Life Rafts, but just as the incursion happens, Mr Fantastic is separated from his wife and children, and watches in horror as they are torn apart. The White Event finally occurs mere moments later, leaving only a white face of Dr Doom in its place...
With the universe destroyed, a new world rises in its place, made up of the remnants of the destroyed universes and known simple as Battleworld. Created by the God-Doom and policed by the Thor Corps. Doom acts as king and god on this world, married to a somehow alive Susan Storm and adoptive father to her children Valeria and Franklin. The various destroyed universes make up separate zones and territories, the majority ruled over by hand-picked barons, and all serve the God Doom.
Sometime after the universe was created, an object was found in one of the zones, a raft of unknown origins. Valeria Doom (Richards) informs Sheriff Strange (Doctor Strange) that the life boat they found seems to be older than the universe itself. Strange takes two Thors with to investigate, already having his suspicions as to what the object is. As the craft is opened, the three are attacked by someone inside, one of the Thors killed in the process. The second Thor runs back to Strange as the Maker and the Cabal emerge from their life boat.
Once the incident is reported, Doom sends the Thors to apprehend the Cabal, and then retires to rest. Once Doom is gone, Strange finds Miles Morales, who had stolen aboard the Life Boat with the Cabal, hiding in the throne room. He explains to Miles that Doom had managed to save pieces of the various universes in their fight with the Beyonders, weaving them together to form Battleworld, his power grown to cosmic levels. He then shows Miles that he had found the other Life Raft from the his own universe, and opens it to reveal Mr Fantastic and other heroes had survived the incursion, and had been in stasis for eight years, Doom having saved them all when he created the Battleworld!
Strange explains to his former comrades that the Beyonders were the ones behind the incursions all along. Doom and he had managed to destroy them, absorbing their power and then using it to create the Battleworld with Doom as its ruler. Meanwhile, The Cabal and Maker are found in Utopolis, and are attacked by the Thor Corps, resulting in a massive battle that rips the city apart. Strange and the raft survivors arrive at the battle, engaging with the Cabal. Doom arrives next, and attacks both parties. Cyclops, fused with the Phoenix Force, tries to stop him, but Doom kills him. He orders the invaders to surrender, but Strange teleports them to safety. Enraged at Strange’s defiance, Doom kills him.
Doom then goes to speak with the Molecule Man, who explains that he is a unique entity in the universe and that he and Doom were able to destroy the Beyonders by combining every Molecule Man in existence in a massive bomb. Meanwhile, the heroes of from 616 split up to avoid being found by Valeria, leading her Justice Division of the Future Foundation after them, though her motives are not clear why.
Over the next few weeks, Battleworld descends into Chaos. Someone known as The Prophet begins gathering an Army to fight against Doom, who in response sends his most loyal Barons to destroy the Prophet’s forces. Meanwhile, Valeria and the Future Foundation discover the source of Doom’s power, leading Valeria to become suspicious of her father. Meanwhile, both Maker and Mr Fantastic (the Reed Richards of their respective worlds) team up to try and stop Doom, sending Peter Parker and Miles Morales Castle Doom to find the source of his power. They encounter Valeria, who asks if anyone from the Raft was responsible for killing Strange as Doom had implied, and the Spider-Men confirm that they had not committed the act. She lets them go, only to have Molecule Man find them soon thereafter. Elsewhere, Panther and Namor reluctantly work together to find Strange’s armoury, discovering a number of powerful artefacts, though they will only work in Doomstadt.
As the war escalates, The Prophet is revealed to be Maximus the Mad, who leads his armies straight to Doomstadt. The Barons bring the fight to him, but soon almost every Baron or former Baron arrive to join in, many fighting for themselves as much as against Doom or the Prophet. While the battle rages, the Richards manage to sneak into Castle Doom themselves, discovering, “the most valuable thing left in the Multiverse.” At the same time, Panther and Namor go to the Deadlands, where Panther uses his status as Lord of the Dead to recruit the Zombies to fight against Doom.
The battle erupts into full on chaos as the most powerful beings from every Battleworld zone converge on Castle Doom in a massive melee. This continues until the giant Ben Grimm (codenamed the Shield) goes on a path of destruction across Doomstadt. Franklin Richards intervenes, revealing that he is the son of Doom and Susan. Grimm, unable to harm Susan’s child, stops his rampage, and Franklin uses Galactus to destroy him. Susan, watching it all from Castle Doom, is reduced to tears, Ben’s death the final knife in her heart. However, Valeria comes to her, and leads her into the castle where the two Reed Richards, the 616 Reed shocked to see his wife alive. The battle outside continues, Doom killing Thanos and seemingly on the edge of victory, until a portal opens, revealing Namor and Panther arriving with the army of zombies to wage one last battle, Panther wielding the Infinity Gauntlet, and challenges Doom to one last fight.
Inside Castle Doom, Reed convinces Susan trust him, and together with Maker and Valeria they go see Molecule Man. There, Maker betrays them, but is killed by Molecule Man in response, who then saves Reed. Doom arrives soon thereafter, realizing that his battle with Panther was a distraction, and mocks Reed for being unable to save the Multiverse. Reed counters, pointing to Doom’s insecurity that the first thing he did with his power was to take Susan and her children as his own. This insult makes Doom realize that Reed is right, and admits that Reed would have done better with the power he had stolen from the Beyonders. The Molecule Man then strikes, transferring Doom’s power to Reed destroying the Battleworld. With this new found power, Reed begins to recreate the various universe, declaring in the end that, “Everything Lives.”