The CW has revealed the official synopses for this year’s Arrowverse crossover, “Elseworlds.” Annual crossover events have become something of a tradition now The CW has such a wide range of DC superhero shows. This time round, the intriguingly entitled “Elseworlds” will only unite the stars of Supergirl, Arrow, and The Flash.

This is probably the most exciting crossover to date, serving as a backdoor pilot to a new DCTV show; a Batwoman series starring Ruby Rose as the first member of the Bat-family to make her Arrowverse debut. So far, The CW has been careful to keep the plot under wraps, although the official “Elseworlds” trailer confirmed that Superman will take to a black suit and the inter-dimensional being known as the Monitor will appear.

The crossover is due to begin in only a fortnight’s time, on Dec. 9. As a result, The CW has finally revealed the official synopses for the relevant episodes of The Flash, Arrow, and Supergirl. They reveal a few new details about the plot, but naturally they get increasingly secretive by the last of the three. Here they are:

THE FLASH - “Elseworlds, Part 1” (The CW, December 9, 8:00-9:00 p.m. ET)

ARROW - “Elseworlds, Part 2” (The CW, December 10, 8:00-9:00 p.m. ET)

EPIC ELSEWORLDS CROSSOVER KICKS OFF TONIGHT — When Barry Allen (Grant Gustin) and Oliver Queen (guest star Stephen Amell) wake up one morning and realize they have swapped bodies with each other, the two set off to find out what disturbed the timeline to cause such a shift. However, things quickly go from bad to worse when they present their case to Team Flash and the gang doesn’t believe them. Barry and Oliver realize they need Supergirl’s (guest star Melissa Benoist) help and travel to Smallville on Earth-38 where they end up meeting Kara’s cousin, Clark Kent (guest star Tyler Hoechlin), and intrepid reporter, Lois Lane (guest star Elizabeth Tulloch). LaMonica Garrett guest stars as The Monitor. Kevin Tancharoen directed the episode written by Eric Wallace & Sam Chalsen (#509).

SUPERGIRL - “Elseworlds, Part 3” (The CW, December 11, 8:00-9:00 p.m. ET)

THE ELSEWORLDS CROSSOVER CONTINUES IN GOTHAM CITY WITH BATWOMAN (RUBY ROSE) — With Oliver (Stephen Amell) and Barry (guest star Grant Gustin) still stuck in the other’s bodies, the two get a lead on John Deegan (guest star Jeremy Davies) and head to Gotham City with Supergirl (guest star Melissa Benoist) to figure out why their reality has changed. While there, they meet the mysterious Kate Kane (guest star Ruby Rose) who provides them with information that leads the group to Arkham Asylum. James Bamford directed the episode with teleplay by Marc Guggenheim and story by Caroline Dries (#709).

The synopses confirm that “Elseworlds” will expand the Arrowverse to an unprecedented degree, with the heroes heading off to both Smallville and, of course, Gotham City itself. Arrowverse co-creator Marc Guggenheim has described Gotham as “a dead city” and “practically a ghost town” during the crossover, suggesting that Batman has been missing for the last three years. There’s been some speculation that Bruce Wayne has been forced to retire after a “Knightfall”-esque plot saw Batman’s back broken by Bane. It will be fascinating to see just what inspires Batwoman to finally fill the gap left by the Dark Knight.

THE BATTLE CONCLUDES — Supergirl (Melissa Benoist), The Flash (guest star Grant Gustin), Green Arrow (guest star Stephen Amell) and Superman (guest star Tyler Hoechlin) engage in the battle of their lives. Jesse Warn directed the episode with story by Marc Guggenheim and teleplay by Derek Simon & Robert Rovner (#409).

Who has swapped Barry Allen and Oliver Queen’s minds and bodies, and just why do they need the help of Supergirl and Superman? Which Arkham inmate is involved in the crisis, and will the Arrowverse actually introduce its version of the Joker? The synopses leave a lot of questions unanswered.

More: Predicting the Arrowverse Elseworlds Crossover Villain

Source: The CW