This article makes a valid point and then someone makes another with Cassandra Cain in the comments

Check this out.  It's win-win.  I don't have time today to read the Linda Holmes piece that inspired all this discussion-- maybe this weekend-- but I do have time to thank QueerJock2 for mentioning Cass along with a number of other characters who should be appearing in movies while making a point about how under-represented women of color have been as heroes in comic book movies and TV shows.  You can cast characters like Nick Fury and Perry White color-blind-- and you should-- but why ignore Cass, Misty Knight, Katana, The Question, Dani Moonstar, Xi'an Coy Manh, Armor, Captain Marvel/Photon/Pulsar, Jolt, Jubilee (minor background appearances don't count) and so many others?

Cass, Katana, Knight and The Question could easily headline kick-ass solo movies.  And as we all know, Cass should also be appearing in comics right now, but that hasn't happened yet.