>>5215899>why they decided to add Poison Ivy and Harley Quinn.Because they are more well known than many of the other actual heroines in DC?
Also I think because they were easier to assign persona girls can relate and admire, based on their design and characteristics.
And I just realized they didn't go with Catwoman, at least for the main line up. She is well known enough, but visually I think they thought it overlaps with Batgirl, and persona wise it was hard to make out a character that is not a cat-burglar? Thief with claws and a whip is not really a good role-model. I guess they could make her all about animal protection like in TAS...