Supergirl Does Not Want to Open the Pandora's Box of Alternate Flash and Arrow Heroes

The CW/DC universe has so far been unafraid to start dealing with alternate Earth versions of its characters —especially Flash, with its regular sojourns to Earth-2. But even though Supergirl is already set on an alternate Earth, it has no plans to reveal its own takes on Barry, Ollie, or anyone else any time soon.

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Source: io9