The CW-verse seems to get a little wilder this season. A few months back the CW launched Vixen, an animated series seemingly part of their DC TV Universe.
While her apparition in live-action was still undecided, TV Insider confirmed that Megalyn Echikunwoke will reprise her role of Mari McCabe during this season's fifteenth episode of Arrow, as explained by EP Marc Guggenheim:
"We’re not only thrilled to be further expanding our DC television universe by bringing in the live-action incarnation of the CW Seed hit, Vixen, we’re immensely excited that Megalyn will be revisiting her role as Mari McCabe.”
We already saw her interact with our main heroes Oliver and Barry. So her introduction won't be too hard to sell, assuming that you've already watched Vixen.
This is a really good news for the DC TV Universe as the CW is trying to built a really coherent universe and expand it as much as they can. My bet is that there's either a live-action show in talks for Vixen if viewers cling to her character or maybe a spot for her in an hypothetical second season of Legends Of Tomorrow.
If you haven't watched Vixen yet, I really advice you to give it a try before her appearances on Arrow next year. And it will only take 30 minutes of your time so the ball is in your court.
Arrow returns January 20th on The CW.