In addition to the recent Arrow news of Stephen Amell mentioning that he wants to be in Justice League, the CW has added Summer Glau to the cast.
Summer Glau, known for Firefly and Terminator: The Sarah Connor Chronicles, will play a rival to Oliver Queen with Isabel Rochev, the dangerous Vice President of Acquisitions for Stellmoor International.
Isabel Rochev is also a character in DC Comics, having fallen in love with Oliver's father and thinking herself the rightful heir to Queen Industries.
TV Line reports Summer Glau will have a reoccurring role, and the name of Isabel Rochev has also been seen on Robert Queen's list in an episode.
Arrow returns Wednesday, October 9th to the CW.