It seems that the original character of Thea Queen (Oliver Queen's younger sister) on the new Arrow show might not be so original. Indeed, it seems it combines elements of the Roy Harper and Mia Dearden characters and has been planned to do so since the original pilot script...
In the "Arrow" pilot, Queen refers to his younger sister as "Speedy," an Easter egg that could easily get lost in the shuffle of an already jam-packed episode. But executive producers Marc Guggenheim and Andrew Kreisberg didn't make the reference just for the reference's sake. In fact, there's an early version of the pilot that further teased Thea Queen's eventual assumption of the Speedy mantle.
"My favorite moment in the original script, which Andrew wrote, that didn't make it into the pilot is when she's in the room with [her friend] and they're crushing up the pills," Guggenheim told TV Guide. "The original stage direction was she reaches over to the shelf and grabs a junior archery championship trophy to crush the pills. I'm like 'Why didn't we do that? We never should have taken that out!'"
That's the third suggestion of a superheroine being a part of Arrow in as many days. Could this be paving the way to a Birds of Prey spin-off more in line with the original comics? We can only hope.