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Could Supergirl’s Medusa Virus Defeat the Dominators?

The CW’s much-hyped DC Arrowverse crossover began Monday with Supergirl, the first installment in the four-night “Invasion!” event. And while the crossover didn’t truly kick-off until the “last panel” of the episode, Supergirl could hold the key to defeating the looming alien threat with newfound Medusa virus.

When Barry and Cisco showed up looking for Kara at the end of the episode, we didn’t learn anything about the impending invasion, but we’ll find out all about it on Tuesday’s episode of The Flash. Here’s the episode description:

“When aliens called the Dominators attack Central City, Barry (Grant Gustin) speeds over to Star City to ask the Green Arrow (guest star Stephen Amell) for help in stopping them. Realizing the battle against the Dominators is bigger than they thought, they track down the Legends of Tomorrow, and Barry and Cisco (Carlos Valdes) create a breach to bring back a secret weapon – Supergirl (guest star Melissa Benoist). Once all of the super friends are assembled, they come up with a plan to attack but a shocking secret related to Flashpoint is revealed and suddenly no one is sure who they can trust. Meanwhile, Wally (Keiynan Lonsdale) wants to join the battle against the aliens but Iris (Candice Patton) tells him he’s not ready.”

The Flash -- "Invasion!" -- Image FLA308b_0445b.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.
Kara/Supergirl and Barry Allen on The Flash, "Invasion!"

The “secret weapon” referred in the synopsis is Supergirl herself, but Kara’s powers and invulnerability may not be the only thing she brings to the table in the fight against the Dominators.

On Monday’s episode of Supergirl, we learned that her father, Zor-El, created a virus which can instantly kill any alien. This Medusa virus is now in the hands of Cadmus where it’s been weaponized by Lillian Luthor. And while Lillian’s plan to unleash it on the aliens of National City is thwarted by Lena, it’s possible there’s more Medusa virus where that came from.

Now, they’ve already used it to cure J’onn of his “White Martian Disease,” but could the virus which Zor-El created be used by the Arrowverse heroes to destroy the Dominators once and for all? We’ll find out later this week.

The synopsis for Legends of Tomorrow “Invasion!” tells us that it’s Martin Stein who hatches a plan…

After learning the Dominators’ plan for the world, the Legends must work together with The Flash (guest star Grant Gustin), Supergirl (guest star Melissa Benoist) and Green Arrow (guest star Stephen Amell) to kill them once and for all. Meanwhile, Stein (Victor Garber) figures out, with the help of others, how the team can terminate the Dominators, but is distracted by the aberration he realizes he created in 1987.

…but that doesn’t rule out Medusa, or a similar virus, playing a key role.


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