User blog comment:Larstheninja/Supergirl/@comment-1909132-20130104181950/@comment-1038387-20130104205427

If that's the case, we should have Sean Maher in something. He's the only one who's never done anything in DC animation.

Totally cheating with Ron Glass, who had a minor part before joining the cast of Firefly.

But as for Summer, no. After FF/S, she was typecast in Terminator: Whatever, and again in Superman/Batman: Apocalypse. Little girl turns out to be more than she appears and struggles with it. I'd love to hear a fresh young voice for Kara, should she appear.