Thread:Love Robin/@comment-26120048-20170924231029/@comment-366087-20170925032255

First, if we use the reasoning of them "being in the same multiverse", well, by definition ALL universes are part of the MULTIVERSE. The Arrowverse is A universe.

Second, there are no… "twinning" between the Arrowverse and Supergirl-verse. Unlike how there is with Earth-2 and the Arrowverse. And the main reason why Earth-2 characters are tagged as Arrowverse is that 1) there is no separate show for Earth-2, which necessitates all stories about Earth-2 are told to us THROUGH the Arrowverse—specifically, The Flash.