How Supergirl Is Involved in the Arrowverse Post-Crossover

The Arrowverse "Invasion!" crossover has come to a close, but the door remains open for more crossovers in the future.

The Flash, Arrow and DC's Legends of Tomorrow all exist in the same universe, while Supergirl resides in a different part of the multiverse on Earth-38. But the conclusion of the "Invasion!" crossover added a new wrinkle that makes bringing Supergirl into the fold a lot easier in the future.

Full spoilers for the "Invasion!" crossover continue below. Check out our reviews of The Flash, Arrow and Legends of Tomorrow crossover episodes, plus the moments that were left on the cutting room floor.

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