Check out every photo from the Arrowverse's 'Elseworlds' crossover

Oliver Queen (Stephen Amell) and Barry Allen (Grant Gustin) aren't the only ones suffering an identity crisis in "Elseworlds."

In this year's Arrowverse crossover, Oliver and Barry swap lives (and appearances!) as a result of Arkham Asylum's Dr. John Deegan (Jeremy Davies) rewriting reality. However, new photos from the Supergirl hour of the crossover reveal that Cisco (Carlos Valdes) and James Olsen (Mehcad Brooks) will also face some reprecussions from the evil doctor's tinkering.

Click through the gallery to see a first look at Cassandra Jean Amell as Nora Fries; Ruby Rose's Batwoman with Grant Gustin as Green Arrow and Stephen Amell as the Flash; new shots the Monitor (LaMonica Garrett) and John Deegan; Oliver hanging out with Superman (Tyler Hoechlin) and Lois Lane (Elizabeth Tulloch) on the Kent farm; and more.

“Elseworlds” begins Sunday, Dec. 9, with The Flash at 8 p.m. ET; continues Monday, Dec. 10, at 8 p.m. ET with Arrow; and concludes the following night at 8 p.m. ET with Supergirl.

Another shot of Batwoman after she thwarts a prison break at Arkham Asylum.

The iconic Bat-Signal makes its debut in the Arrowverse. This scene was shot on-location in Chicago and will actually make you laugh when you see it.

Looks like our heroes find themselves on the wrong side of the law.

Supergirl (Melissa Benoist), the Flash (Stephen Amell), and Green Arrow (Grant Gustin) vs. The Monitor (LaMonica Garrett).

'90s Flash (John Wesley Shipp) joins Green Arrow and Supergirl against the Monitor.

Amell as the Flash, and Gustin as the Green Arrow.

The Trinity stands against the Monitor.

Is that Bane's mask in this new shot of Cassandra Jean Amell as Nora Fries?

Danielle Panabaker's Caitlin Snow joins the crossover craziness!

Stephen Amell rocking the Flash ring as Barry Allen/The Flash.

Jeremy Davies as Dr. John Deegan

The Super-Cousins visit S.T.A.R. Labs!

Amell as Barry Allen/The Flash, Gustin as Oliver Queen/Green Arrow, Benoist as Supergirl, and Carlos Valdes as Cisco Ramon.

Another shot of Tyler Hoechlin as the Daily Planet's mild-mannered reporter.

Training on the Kent Farm appears to be going well.

The Trinity hanging out the old Smallville Kent Farm!

Here's a new shot of Elizabeth Tulloch as Lois Lane!

Cisco steps to the bad side when reality is rewritten once again.

Here's your first look at Cassandra Jean Amell as Nora Fries, a.k.a. Mr. Freeze's wife. Stephen Amell said having his wife in the crossover was surreal.

"I was happy that she appears in the Arrow hour. I got to do a little bit of a scene with her," he told EW when we visited the crossover's set in October. "I hope her character can continue to exist in the Batwoman world."

Here's Batwoman with the Scarlett Speedster.

A new shot of Amell as the Flash.

Gustin as the Emerald Archer!

Why is Kara (Melissa Benoist) holding the Monitor's (LaMonica Garrett) mysterious book?

Holy role reversal! Malcolm Merlyn (John Barrowman), Joe Wilson (Liam Hall), and Ricardo Diaz (Kirk Acevedo) are now cops.

Looks like reality has been rewritten once again!

Supergirl (Melissa Benoist) teams up with the Flash (Stephen Amell), another Flash (John Wesley Shipp), and Green Arrow (Grant Gustin) in one of the trippiest photos of the crossover.

"We joke about it, but I was really jealous that Stephen got to be in my Flash suit with John Shipp," Gustin told EW.

The Monitor (LaMonica Garrett) is up to something with Dr. John Deegan (Jeremy Davies).

What is this mysetrious book in the Monitor's hand?

Clark Kent (Tyler Hoechlin) and Lois Lane (Elizabeth Tulloch) share a tender moment on the Kent farm in Smallville. The producers realized they wanted to include to Lois in the crossover after they figured out what Superman's story would be.

“When we were talking about the story we wanted to send Clark on in the crossover, we were talking about different elements, and that’s when we started talking about Lois,” Supergirl co-showrunner Robert Rovner previously told EW. “We’ve always wanted to bring Lois onto the show. She’s such a great character, and we were just excited to be able to have her, and she organically fits into the story we were telling in the crossover.”

The Steel cousins reunite on the Kent farm in Smallville. Clark's presence will help Kara (Melissa Benoist) deal what happens in Supergirl’s midseason finale.

"Kara is coming out of the midseason finale at a crossroads, and the journey that she’s on is kind of helped by Clark, who is returning from Argo kind of on his own journey,” said Rovner.

Playing Barry Allen/The Flash in the crossover gave Amell the chance to have a few one-on-one scenes with Candice Patton (Iris).

Cisco (Carlos Valdes) also tags along when Barry (Amell) and Oliver (Gustin) visit Supergirl's Earth.

Another shot of Gustin as Oliver Queen and Amell as Barry Allen on the Kent farm in Smallville.

Here's a new shot of Cisco's (Carlos Valdes) rewriten identity.

Amell as Oliver Queen/Green Arrow and Gustin as Barry Allen/The Flash

Gustin and Amell again!

Who could Oliver (Amell) possibly be on the phone with?

Welcome back to Smallville! Here's Tyler Hoechlin as Clark Kent, Bitsie Tulloch as Lois Lane, Gustin as Oliver Queen/Green Arrow, Stephen Amell as Barry Allen/The Flash, Carlos Valdes as Cisco Ramon, and Melissa Benoist as Kara/Supergirl on the iconic Kent Farm.

Tyler Hoechlin as Clark Kent and Melissa Benoist as Kara/Supergirl

Melissa Benoist as Kara/Supergirl, Bitsie Tulloch as Lois Lane, and Tyler Hoechlin as Clark Kent

Candice Patton as Iris West-Allen, Danielle Panabaker as Caitlin Snow, Grant Gustin as Oliver Queen/Green Arrow, and Stephen Amell as Barry Allen/The Flash

Lost's Jeremy Davies as Dr. John Deegan

“LaMonica was ridiculous, like seeing him in his suit, he’s just a monster,” Gustin previously told EW about LaMonica Garrett's character The Monitor. “He’s like an absolute unit. He doesn’t have to do a lot with his performance. He’s so intimidating with just these subtleties, so that’s dope.”

“It’s a strange feeling to put on a suit like this that has been custom made for you knowing that it’s going to transform you into a character that does amazing things,” Ruby Rose, who plays Batwoman in the crossover, previously told EW about wearing her supersuit. “You feel very empowered and it just instantly changes everything you feel in that moment.”

David Ramsey as John Diggle

Grant Gustin as Green Arrow

Stephen Amell as the Flash

Melissa Benoist as Supergirl

Meet Cisco the mob boss!

Mehcad Brooks as James Olsen/Guardian

"I got super emotional filming this scene. Possibly bc of the subject matter and possibly bc it was the last scene before being wrapped for the weekend," wrote Amell when he shared this photo on Twitter.