Galatea's look is loosely based upon the comic book character Power Girl. Her costume is obviously similar (except she does not wear a cape, and her gloves and boots are white instead of blue). In the comics universe, Power Girl was Supergirl's counterpart from Earth-Two, whereas in the DCAU she's a clone. In the comics universe, she is a superhero, whereas in the DCAU, she is a villain. She also resembles Superboy (Kon-El), who is a Cadmus-created clone of Superman.
The Question's "ancient Egyptian conspiracy group" is undoubtedly the Illuminati.
The Got Fluoride? Poster is not only a Got Milk? parody but references that most American water has slight fluoride levels in it - some claim, for dental hygiene; others, as part a some conspiracy like mind control.
The reporter Jerry is drawn to resemble Carl Kolchak, Darren McGavin character, from the TV series "Kolchak: The Night Stalker (1974)".
The clone's name, Galatea, refers to a character from Greek mythology. Galatea was an ivory statue, created to be the perfect woman by the sculptor Pygmalion, and given life by the goddess Aphrodite to become Pygmalion's wife.