Board Thread:News and Announcements/@comment-9346948-20160512213814/@comment-30131072-20161016115202

With or without big crossover those 2 unnamed universe already in Arrowverse (Multiverse). And what's wrong with cameos, in fact i've seen Supergirl and The Flash 1990 and it retroactively made them joining Arrowverse Multiverse.

Besides that, everyone has incorporated them on Arrowverse (Multiverse) except this wiki.

http://www.imdb.com/list/ls074499769/

https://en.wikipedia.org/wiki/Arrowverse

http://www.digitalspy.com/tv/arrow/feature/a799323/dc-tv-universe-explained-the-flash-supergirl-arrow-earth-one-two-three/

http://tvtropes.org/pmwiki/pmwiki.php/Franchise/ArrowVerse