(YT user's restrictions mean I can't embed the video.)
During an interview Lindsey Wagner was asked about the Melissa Benoist tv show, and if she would ever appear on it. Background: Lindsay is on record as not being a fan of modern superhero movies/tv, and thinks a lot of heroines these days aren't really very feminine.
But... although she only gives a brief answer, she does seem to approve of the Supergirl show and it looks like she'd be open to appearing if they offered her an interesting part.
Btw, stick around for the audience Q+A on this video: if you can understand the Liverpudlian accent, the opening question is quite a funny one.