User blog comment:Sladewilson53/Do you think Ras al Ghul is coming/@comment-24136188-20140311032942/@comment-24034641-20140311042136

That's possible, however they may keep it a secret, for example, we only found out Katrina Law was playing Nyssa when they were filming Tremors or Blind Spot, so if that's possible, then we may find out in the next week or two (maybe when Marc Guggenheim reveals the name for Episode 19, as he said it's a special announcement)