Board Thread:General Discussion/@comment-16581186-20161115131009/@comment-16581186-20161115201328

Kaestal wrote: Then wait for the crossover and see what is decided.

They made a Legion ring and Flash 1990s cameo too, and I don't see anyone jumping to add the Legion of Superheroes or Flash 1990s characters I am willing to wait until the crossover. I mentioned that twice in this thread already, but you still feel the need to argue with me about it.

And I'm not aware of those cameos but the point is those shows did not directly interact with anyone or anything from the Arrowverse, whereas Supergirl did, and (again) will, but to a larger degree.