RumourMill: Lynda Carter to Join Supergirl Cast?

The Supergirl TV series has been having fun with its Super Guest Stars, including Dean Cain, Helen Slater, and Laura Vandervoort. It seems that for season 2 they have plans to add another very familiar face to comic tv series fans.  Lynda Carter, Wonder Woman herself, is rumoured to join the cast as the female president of the United States. “We had the perfect role for Lynda Carter, and we…