Calendar Girl is voiced by Sela Ward, an actress who, at the time this episode was made, was conducting a protest campaign against Hollywood's emphasis on youth and its harmful effects on public perception. This episode - the villainess of which is a beautiful woman who has nonetheless been cruelly marginalized after she "turned 30" - could be construed as part of the same campaign.
Calendar Girl's sarcastic remark about dinosaurs, as well well as the ripples in the pool from the Tyranosaur's rumbling footsteps, are clear references to Jurassic Park (1993), among other films.
Batman would not be the only hero to fight a robotic Tyrannosaurus. Superman also fought one in A Little Piece of Home (1996).
Calendar Girl's henchmen are clearly costumed to resemble Chippendales dancers.