If they ever do a Batman Beyond movie...
... Summer should hands down be cast as Inque.
Always liked how Summer can play good and bad characters well. Her role on Arrow was fantastic - I think I like her more of a "bad guy" than I do otherwise.
Why do you think she was good in arrow? All the post i've see thought she was awful.
It was a poorly written character and summer was very badly cast in the series. But as Inque....maybe.