Several peak humans at once

Poison Ivy decided she should breed an army sooner, rather than later. So she modified her womb to accept many babies at the same time and even have multiple sperm in the same egg. She could best sustain this while being supported by plants.

Ivy would breed with Batman, the perfect human in her opinion, along with his Robins. While she would like to breed with metahumans, she felt it was too dangerous without further research.