Shadow (Elseworlds)

NOTE: Do not confuse with neither [Https://fortnite.fandom.com/wiki/A.L.T.E.R.|Shadow SHADOW (Fortnite)] nor Shadow (Earth-219).SHADOW is a military organization from an alternate reality. It arrived to the Barcino Island through a time-space flux caused by The Vault's release of zero energy. It was later known as The Coalition when The Ice King joined them to fight The Brain.

Midas defects
This SHADOW's history is pretty much the same as the one from Earth-TRN1, at least until Season 2. When building The Device, Midas took the decision to not activate it, forgetting about his plan of destroying the Storm. However, he defected to SHADOW, GHOST's rival organization, in which her daughter, Jules, was working as engineer. This is what created Earth-TRN2's Nexus Event, as SHADOW won the Spy Wars.

Apollo's Authority
The Agency was turned into The Authority without the necessity to destroy it due to the Device not activating. Hence, the Wall Of Water never happened. Hence, the island was never flooded. Now, SHADOW ruled the island (although still being controlled by the IO). During the time that Chapter 2: Season 3 should have happened, Jules and Midas discovered a way to exit the loop: they built a device which could take them out of the loop (built using their knowledge to maintain their memories between loops, thing which made them capable of building The Device) leaving an snapshot in the map, which would make whoever was controlling them (the Imagined Order) to not notice their getaway. This device was the Portal Device from the IO, but, from their perspective, they had created it first. It was later used by Chaos Agent.

Herald's warning
On August 22nd, a rift opened above Catty Corner, as seen during the Nexus War: Thor comic. Thor, as Galactus' herald, arrived to the island to warn its inhabitants about the Devourer of Worlds' arrival, although due to The Loop, his memories started to fade away. They used their device to let him and, subsequently, the rest of the Marvel Heroes, retain their memories. This way, they were able to fight Galactus and defeat him before he could take The Zero Point, as they all maintained their memories, and not just Tony Stark.

Teleported to Barcino
Around September 29th, 2020, a time flux teleported Zero Legends, one of SHADOW's main buildings, into Earth-219. Chaos Agent, Midas and Jules where also teleported to the island. There, they realized they had travelled to late July, 2020 (as time moves differently in every Earth). A few weeks later, another organization, The Brain, arrived to the island too, but with evil intentions. So, they brought the Ice King from an alternate Earth to the island, founding The Coalition, which marked the end of SHADOW as their own organization.