The Last Stand

Galaxy Legends: The Last Stand is a long-length event (which works as a fourth season for the map) which continues with the rebooted storyline based on what happened after everybody was expulsed to the outer space in the end of The Switch On. It starts right after the ending of Elseworlds.

Part 1: Shadow & The Ice King variants vs The Brain
When the Elseworlds ended, a multiversal conquest group known as "The Brain", who were led by Rust Lord (whose body had been taken over by Eobard Thawne, aka Reverse Flash), stablished their headquarters at P.E.G.A.S.U.S.. Their aim was simple: conquer Earth-219 and, of course, the rest of their reality. The alternate Shadow, who didn't want this group to rule the world, brought an alternate version of the Ice King to the Barcino island, who stablished his castle over the abandoned Neo-Barcino. They started to prepare themselves to a future battle, which was featured in the War's Horizon LTM.

Looking for more energy
While the Brain soldiers prepared themselves to the battle, the scientists studied the Canyon Caves, discovering a mineral called stormite which used to power the Atominator 9000. When they tested it on their new weapons, they discovered that the stormite could be very useful to defeat Shadow and the Ice King (now known as The Coalition) and continue with their conquest plan. So, they studied the mineral discovering it's origin dimension and, some days later, they opened a rift over Crazy Lake which started to generate stormite ores around the POI, that were farmed by The Brain.

New members of the Coalition
The still-strong zero energy flux caused by the Atominator brought Messed Village to the island and, with it, a variant of the Fire King which joined the Coalition.

The battle of the Headquarters
Both The Coalition and The Brain fought near The Coalition Headquarters in a battle which was featured in the War's Horizon LTM. However, after the battle, the stormite ores that were being created at Crazy Lake gained counciousness and took over the POI, becoming a new threat for everyone. After this, The Brain had no other choice than to join the Coalition, as they didn't want to destroy the multiverse, but to conquer it, while the Stormite Hive Mind seemed to want the opposite.

Return of The Scientist
Time was running out, but Chaos Agent had an idea: call The Scientist (Not the Fortnite version, but the Galaxy Legends one, which is a Harrison Wells doppelgänger) for help. The Scientist, who was in auto-exile after The Antimonitor brainwashed him, received the S.O.S. signal and came to the rescue. His first mission being a part of the Coalition was to recruit Earth-616 Tony Stark, from Reality-M616, who at that time was located at Earth-218, where the Fortnite Battle Royale events where happening at that moment. Stark joined temporary the Coalition as a scientist and, later, as a soldier. Stark also recruited the Lava King.

Wells also tried to recruit the Ice King, who had left the Coalition due to unknown reasons, but he didn't join them. After that, he spoke with X- Lord and Chaos Agent, who told him to prepare for their last chance.

The Last Stand
The Stormite Hive Mind had grown massively, starting to spawn dark fiends which were extensions from itself. The assault group, formed by The Scientist, Iron Man and The Lava King, attacked the mineral with an aim: destroy the central totem, which was the origin of the Hive Mind's consciousness. They were almost loosing the battle, but the Ice King also appeared to help with his Infinity Blade, which let them win. However, during the fight, The Scientist was abducted by The Monitor, who was still alive after the Crisis. And yet, the Stormite Hive Mind was destroyed.

Reverse-Flash's secret plan
In the aftermath, Thawne killed Chaos Agent and used the power The Brain had gained during the season's first part to, alongside the negative speedforce, recreate his original body. Then, he revealed himself to the Coalition members and he also told them that they should check the rests of Crazy Lake, as there was something hidden in there. And yes, it was: he had planted an antimatter bomb which disintegrated Earth-219 from its reality. The Monitor, who had predicted this, sent The Scientist, now full of the Monitor's cosmical power, to the past, right before his return to the island. Using his powers, he exchanged the whole Earth-219 with an another reality's variant (R-C017), which was currently dead at the time, but leaving the antimatter bomb, which was already placed at Crazy Lake, at the former Galaxy Legends reality. This saved everyone. Even so, Thawne escaped and returned with his new body to Earth-Prime, still located at R-F302. Tony Stark also came back to the Fortnite world to complete his plans to defeat Galactus.