The Poster
Um!! Stephen Amell shared the poster on Twitter the the caption, "My name is Barry Allen and I am the fastest man alive." What!
Ruby Rose Debuts as Batwoman
One of the first things we ever knew about this year's crossover was that we'd be meeting Katherine Kane, also known as Batwoman. She'll first appear in the crossover before potentially starring in her own CW pilot, becoming one of TV's first lesbian superheroes.
In early August, it was announced that Australian actress and Orange is the New Black and The Meg star Ruby Rose will be taking on the role. Rose then had to leave Twitter after online harassment criticizing the casting.
Hello Gotham City
While we haven't yet heard if we'll be meeting Batman himself, we do know that we'll get to venture into Gotham City for the first time in the Arrowverse during the crossover.
Last season, Arrow confirmed the in-universe existence of Batman and Gotham City with a little shoutout to Bruce Wayne, so anything could happen.
Air Dates Revealed
This year's crossover marks the first time the event has begun on a Sunday (now that the CW has returned to programming Sundays), beginning on Sunday, December 9 with The Flash. It will continue on Monday, December 10 with Arrow and ends on Tuesday, December 11 with Supergirl.
For the crossover, The Flash and Supergirl will be switching timeslots, as Supergirl will typically be airing on Sundays this season and The Flash will air on Tuesdays.
Superman Returns
Tyler Hoechlin will reprise his Supergirl role as Superman/Clark Kent for the crossover. He previously appeared in four episodes of the series last year, but hasn't been seen since the second season finale when he declared that he's motivated in every fight by his love for Lois Lane, which makes it extra special that on the crossover, he'll be joined by...
Meet Lois Lane
The CW announced that the crossover will also serve as the Arrowverse debut of Lois Lane, for whom casting has just started.
We've already met Lois' younger sister Lucy, played by Jenna Dewan, and her father Sam, played by Glen Morshower, and we've heard quite a bit about the woman herself, but have yet to actually meet her.
"We couldn't be more excited to introduce Lois Lane to the Arrowverse," said Supergirl EPs Jessica Queller and Robert Rovner. "This dogged, determined and brave reporter will make for a strong partner to Superman and amazing addition to our universe of DC characters."
Elizabeth Tulloch Wins the Part
The iconic role of reporter Lois Lane goes to Elizabeth "Bitsie" Tulloch, who most fans will know from the NBC show Grimm. She'll play opposite to Tyler Hoechlin as Clark Kent/Superman.
Meet Mr. Freeze's Wife
Cassandra Jean Amell, who just so happens to be the wife of Arrow star Stephen Amell, will play Nora Fries in the crossover. Nora is the wife of Mr. Freeze, but there's no word yet on who (if anyone) will play Mr. Freeze himself.
The Doctor Is In
Jeremy Davies has been cast as Dr. John Deegan, a doctor at Arkham Asylum for the Criminally Insane in Gotham City "but he might be crazier than the inmates he treats." It sounds like he may provide the catalyst for the crossover, since it's his "machinations" that draw Green Arrow, The Flash, and Supergirl to Gotham City.
The Theme
The CW revealed the three-show crossover will have "Elseworlds" as its theme. Eleseworlds is an imprint of DC Comics for stories that take place out of canon.
The Monitor
LaMonica Garrett will play Mar Novu, a powerful extraterrestrial being known as the Monitor. The Monitor was created by Marv Wolfman and George Pérez as part of DC Comics' 50th Anniversary.
Back in Black
Superman is here, but something looks...different. Hoechlin appears to be wearing the iconic black suit that Superman donned after he was resurrected in the comics. The recent Justice League movie famously didn't include the suit when Superman (Henry Cavill) returned from the dead, but at least The CW has us covered.
Both Stephen Amell and Tyler Hoechlin posted the pic, with Hoechlin captioning it, "Back in black. Here we go again..."
Freaky Friday?
After the world went nuts over the poster, Stephen Amell started having a lot of fun on Instagram, sharing pics like this one which he captioned, "One does not simply walk in The Flash suit."
This just feels so...wrong. Elseworlds is freakin' us out already.
WHAT'S GOING ON!?
This is never not going to be weird, and apparently it was a bit weird for Gustin as well.
"Not that this Arrow costume isn't incredibly comfortable, but I'm pretty jealous that @stephenamell is wearing my Flash suit in a picture with @johnwesleyshippjr wearing his OG Flash suit," Gustin captioned this pic. "WHAT'S GOING ON!?"
A commenter summed it up pretty well by writing: "I dunno what's going on, you're the one on the show"
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Flash Meets (Not) Flash
So many Flashes and none of them are the regular Flash. Does your brain also hurt thinking about this crossover?
An Expert Recreation
John Wesley Shipp appears to be reprising his role as Barry Allen from The Flash of the 1990s, and while he's not wearing the original costume, he's wearing a recreation based on the original costume, which Warner Bros sent over as reference.
"Crispy! To be handled with surgical gloves only," Shipp warned.
In a Nutshell
Amell captioned this grinning Flash photo with "I'm really tired, but here's the crossover in a nutshell." That smile bodes well then, doesn't it?
Tommy Returns?
With little to no explanation other than a couple exploding heads (his choice caption for most of his crossover pics), Amell posted a pic with Colin Donnell, who starred back in the first few seasons of Arrow as Tommy Merlyn before he tragically died. Donnell returned in last year's crossover as an alternate version of Tommy, so could he be back once again?
Donnell's caption didn't give much more info, but did at least confirm there's a question to ask: "Well this is...interesting huh?"
No Smiling for Batwoman
This is the photo that made us truly wonder if Ruby Rose can move her face in her mask, because how else could she resist matching Melissa Benoist's grin?
"Indicative of my excitement that she's here and kicking ass," Benoist said in her Instagram post.
Two Kryptonians and a Journalist
Kara, her cousin Clark, and his girlfriend Lois got together for a family pic on the Kent family farm, which appears to be the same Kent family farm used in Smallville, because there wasn't already enough going on in this explosion of superheroes.
"Two kryptonians and a journalist walk into a crossover..." Melissa Benoist said of this soon to be iconic photo.
Lois and Clark
The new adventures of The CW's new Lois and Clark.