Don't blame Ms. Montilla yet, as there might be other issues involved. Remember, the Supergirl character and brand is owned by DC Comics, and their parent company Time Warner has been extremely active in the past few years in protecting their intellectual properties, with their legal counsel sending cease-and-desist letters to websites and other entities who use their IPs without consent.
keating, was DC Comics approached on the planned screening of this movie? I also dimly recall them being involved in a lawsuit against the producers of Ariel Ureta's Zoom, Zoom Superman back in the '70's.