User blog comment:Eobard95/Black Siren and Dinah Drake futures/@comment-1330227-20171003004320

Why do you think they can't have two characters with the same powers? Arrow has had 2 archers a few times, Flash has 2 speedsters and sometimes 3. Arrow can have Black Canary and Black Siren, though I would be fine with Dinah going to Legends and pulling a Hot Tub Time Machine/Futurama.