Supergirl DC TV Crossover Poster Released

The CW has released a new poster for the episode of Supergirl that will be a part of the four-part DC TV "Invasion!" crossover.

The poster features Supergirl in the foreground, with Martian Manhunter seen behind her and one of the Dominators in the background. Check out the full poster in the gallery below.

There's also what looks like a portal on the right side of the Supergirl poster. It seems likely that the portal is a hint that we'll see interlocking posters from the other DC television series on the CW that are part of the "Invasion!" crossover - The Flash, Arrow, and DC's Legends of Tomorrow - with the portal linking the Supergirl poster of the others the same way a portal may allow Supergirl to jump from her universe into the Arrowverse.

With the poster releasing the same day that Supergirl airs - thought the crossover episode won't air until after the Thanksgiving holiday - it's possible that The Flash poster will come on its air day, Tuesday, followed by Arrow on Wednesday and DC's Legends of Tomorrow on Thursday.

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In the Supergirl crossover episode, titled "Medusa," Eliza (guest star Helen Slater) comes to town to celebrate Thanksgiving with her daughters. Alex (Chyler Leigh) decides it's time to come out to her mother; Kara (Melisa Benoist) is shocked when Eliza suggests Mon-El (Chris Wood) has feelings for her, and Winn (Jeremy Jordan) and James (Mehcad Brooks) consider telling Kara the truth about the Guardian. Meanwhile, CADMUS unleashes a virus that instantly kills any alien in the vicinity so Kara enlists an unexpected ally – Lena Luthor (Katie McGrath).

In Supergirl Season 2, Kara has left the safety of being Cat Grant's assistant in order to figure out what she really wants to do, while as Supergirl she continues to work at the DEO., protecting the citizens of National City and searching for Jeremiah and Cadmus. Along the way, she will team up with Superman (Tyler Hoechlin) to battle new villains, as she strives to balance her personal life with her life as a superhero.

Supergirl airs Mondays at 8 p.m. ET on The CW.