Board Thread:Arrow discussions/@comment-807326-20171020051525/@comment-26537965-20171020160541

Ghost Leader wrote:

Diagonally33 wrote: On Supergirl's world there is Gotham.

Supergirl s01e01 'The Adventures of Supergirl'

Father saying to his family: "We're moving back to Gotham".

 Central City and Star Labs exist on Earth-38, as seen in World's Finest, so it's not a stretch to think Gotham City exists on different Earths, too. S.T.AR Labs does not.