Board Thread:Arrow discussions/@comment-1783334-20170516181147/@comment-24152851-20170802001949

It just doesn't fit with Arrow's grounded theme. Black Siren was a one-time incidental thing because she already debuted on The Flash and they didn't want to waste her character. But otherwise, Arrow will typically stray away from the sci-fi issues and leave those to its cousin shows.

Adrian Chase's E-2 doppelganger will not hold the same weight as Laurel's doppelganger. It'd be doing so just for the sake of "Adrian Chase as vigilante just like in the comics". Zoom was pretending to be Jay Garrick and the real Jay Garrick wasn't Hunter's doppelganger, so already The Flash has demonstrated it doesn't have to be doppelgangers to share a name.