Thread:Love Robin/@comment-4708882-20180518225407/@comment-4708882-20180518235934

Arrowverse as stated previously is considered a multiverse with many alternate realities connected not simply a single Universe as even part of Flash has been an alternate reality due to Barry changing the past. Arrowverse is merely defined as a show / setting taking place officially in the multiverse as one of the Earths. Things like Smallville, Gotham and movies from DCEU wouldn't be part of the Arrowverse as nothing implied they are part of the shows multiverse but Supergirl has indeed been confirmed part of this, officially had crossovers and been technically in danger due to Zoom in season 2 of Flash as he stated that should he win all the multiverse except one version of Earth would be destroyed.