Missing major characters

I love seeing some of the more obscure characters they use, such as Big Barda & Lady Shiva, but they seem to do this at the expense of some bigger names. The two biggies who are missing are Black Canary and Zatanna. Then there are others not as well known who I would love to see on the show: The Huntress, Vixen, Fire & Ice (though Fire appears in background scenes, she has yet to feature in a story), Jade, Stargirl, the list could go on. I hope they expand the roster in the future.