The CW has revealed the first poster for this year's Arrowverse "Elseworlds" crossover featuring The Flash's Grant Gustin and Arrow's Stephen Amell ( via Amell's Twitter), showing the heroes as you've never seen them before - as each other.



My name is Barry Allen and I am the fastest man alive. pic.twitter.com/TibqsR7mT8 — Stephen Amell (@StephenAmell) October 16, 2018

The 10 Best DC Comics Elseworlds Stories 11 IMAGES

Amell appears as The Flash while Gustin dons Green Arrow's hood and bow, hinting that, much like last season's crossover, Crisis on Earth X, we can expect to see some new twists on our favorite heroes across the three-night crossover event.A staple of DC's comics output, Elseworlds explores the idea of alternate realities within the DC universe - creating iconic comic book stories like Gotham By Gaslight and Superman: Red Son , in which familiar heroes are given very different origins, forever altering the course of their destinies.Last week, The CW and Warner Bros. TV debuted the first look at Ruby Rose in costume as Batwoman from the crossover , and this week, we got a first look at Superman (Tyler Hoechlin) in a decidedly different costume . He'll be appearing in the crossover alongside Lois Lane (Elizabeth Tulloch) making her Arrowverse debut, plus iconic DC Comics character The Monitor, played by LaMonica Garrett. (We've got a few theories about how The Monitor and the introduction of the Elseworlds concept could shape the Arrowverse moving forward.)The CW's three-night Elseworlds crossover event kicks off Sunday, Dec. 9 at 8 p.m. ET/PT with The Flash, continuing Monday, Dec. 10 with Arrow, and concluding on Tuesday, Dec. 11 with Supergirl. For more on the Arrowverse, check out the season premiere reviews for The Flash Arrow , and Supergirl , plus a spoiler-filled breakdown of Arrow's big Season 7 twist