Every Easter Egg In Arrowverse's "Elseworlds" Crossover

Oliver Queen and Barry Allen undergo a body swap.Freaky Friday.The style body swap shows red skies and lightning storms over Central City. This is an Easter egg from the comics and the shows. Comics show red skies starting the Crisis on Infinite Earths storyline.Crisis on Infinite Earths.The first season of The Flash.Barry finds a 2024 newspaper. The headline reads "Flash Missing Vanishes In Crisis." A smaller article says "Red Skies Vanish."Barry finds a 2024 newspaper. The headline reads "Flash Missing Vanishes In Crisis." A smaller article says "Red Skies Vanish."

This shows, along with the Monitor's inclusion in the episode, proves "Elseworlds" sets up the Arrowverse's Crisis on Infinite Earths.The Monitor's inclusion in the episode proves "Elseworlds" sets up the Arrowverse's Crisis on Infinite Earths.This inclusion in the episode shows "Elseworlds" sets up the Arrowverse's Crisis on Infinite Earths.Crisis on Infinite Earths..

Oliver makes a superspeed drawing after reviewing the past conversation between the Monitor and John Deegan. Oliver points out the meeting happened in Gotham City.

Legendary comic artist Jim Lee did the art.Jim Lee..

Oliver and Barry go to Earth-38 for Supergirl's help. After training, Cisco warns them about a robot destroying the city. They return to Earth. Supergirl and Superman join. When Cisco asks Clark who he is, Clark says, "A friend."

This recalls Christopher Reeves saying the same thing when he met Lois Lane in Superman: The Movie.Superman: The Movie..

Oliver arrives in Gotham City. He reveals an old radio journalist contact from before he got stuck on Lian Yu and became the Green Arrow. He mentions her name is Vesper Fairchild. Fairchild had a brief relationship with Bruce Wayne in the comics.The Green Arrow.He mentions Vesper Fairchild. Fairchild had a brief relationship with Bruce Wayne in the comics.

Ollie and Diggle walk past another cell belonging to Guggenheim, M. This honors executive producer and "Elseworlds" writer Marc Guggenheim.

Earth-90 Flash warns the team about The Monitor's plan. Oliver recognizes Diggle. He states Diggle is not wearing his ring. This references the fan theory that Diggle would become the Arrowverse's Green Lantern, John Stewart.

During the Arkham riot, Caitlin finds Nora Fries, played by Arrow star Stephen Amell.Caitlin finds Nora Fries, played by Arrow star Stephen Amell.Star Stephen Amell's wife is Cassandra Jean Amell. While Nora searches shelves, the Bane mask is found.The Dark Knight Rises.The Bane mask from The Dark Knight Rises can be seen.

The show cuts to Kent Farm. Remy Zero's "Save Me" starts playing. This was the opening credits theme during Smallville.Smallville.This theme plays during Smallville's entire run and nods to another fan-favorite series.

John Deegan rewrites reality again. Barry and Oliver become powerless, wearing identical clothes, and get stuck in the city. A paper they find calls them the Trigger Twins, wanted men from early '90s DC comics history.

While talking to Kate Kane, Kara picks a Shakespeare bust from a box. In the 1966 Batman series, Bruce pulled a Shakespeare bust to the Batcave.

Oliver wakes up, then the Flash calls him to a lab break-in. The lab is Ivo Labs in Central City. Oliver has a past with this lab.

Professor Ivo appears in Arrow's second season.Arrow features this in 'Every Easter Egg In Arrowverse's "Elseworlds" Crossover'.During Arrow's second season, Oliver is stuck on Lian Yu. Oliver kills him soon after he creates the Mirakuru serum, which gives Slade Wilson strength.

Oliver stops a robbery at Ivo Labs and accidentally activates Professor Ivo's invention, Amazo. The robot mimics any power it sees, making it super strong.

Oliver has a history with Amazo's creator; he killed Professor Ivo while Ivo was marooned on Lian Yu. Ivo's ship that crashed in the bay is named for the android.

The Arrowverse shows took time to accept Gotham and Bruce Wayne. "Elseworlds" shows Oliver believes Batman is a myth made up by the Gotham police. Oliver insists he is the original vigilante, which points to Arrow's first season.That season featured a much darker, grounded feel.This is from 'Batman Begins'.Batman Begins vibe.

When Lois helps Clark stop Deegan, she uses a large hammer. This is likely Steel's hammer, which appeared earlier in the crossover at the Fortress of Solitude.

Supergirl first appears in the crossover while spending time with Clark Kent and Lois Lane on the Kent farm.

This is a nod for longtime fans of DC shows.Shows on the CW.These scenes were filmed on the same farm.The same farm.That farm.Smallville.The 'Smallville' Farm was shot during its ten-year run.

After entering Arkham Asylum, Oliver and Diggle walk through a corridor with many familiar Batman villains stored. Penguin, Poison Ivy, Clayface, and The Riddler are just some of the criminals Batman removed from Gotham.

While Killer Frost and Nora Fries fight in Arkham, Nora grabs her husband's cold gun to fight ice with ice.

After Oliver's failed lightning throws, a box of vials labeled Crane, J fall, and breaks. Jonathan Crane is Scarecrow, and the vials break into the air, releasing his fear gas. This makes Oliver and Barry see each other's enemies.

Both Arrow and The Flash start each episode with a quick character summary. Because Barry took the Green Arrow role in "Elseworlds," the episode opening showed Grant Gustin voicing over and appearing in the montage, like Stephen Amell usually does.

The first Arrowverse crossover aired in 2014 during the third season of Arrow.Arrow.and the first season of The Flash.The Flash.The first event had two standalone episodes where characters from both shows interacted.

One memorable scene shows Oliver training Barry in tactics. Oliver tells the Scarlett Speedster to try and hit him before he shoots. A confident Barry zooms in and catches Ollie's arrow, but crossbows hidden in the ground shoot him in the back.

Barry finally gets payback on the Kent farm in the "Elseworlds" crossover. Barry and Oliver teach each other their powers. Barry turns the tables. Barry's hidden crossbows shoot Oliver in the back.