Nah, we still need Secret.
And Artemis isn't Arrowette.
Secret already showed up...
and according to Peter David Arrowette has too:
A young Cissie King-Jones appears in the episode "Insecurity," where her father Bernell is nearly killed by Black Spider before being rescued by Green Arrow and Artemis. Though she is not named in the episode, Peter David confirmed on his blog that the young girl was indeed Cissie. The fact that she sees and is in awe of the rescuers may be meant to imply that they will inspire her to become Arrowette at some point in the future.