Everyone Love Ivy...Even Batman.

Poison Ivy's true power over plans was shown when she had a plan to use all the plants of the world to control everyone. Human, metahuman, alien, what have you. Masters of Magic, Super-science Geniuses, every leader, and more.

The only failure was Batman/Bruce Wayne, who managed to resist her control while making an antidote for him and his fiancee Catwoman/Selina Kyle. However, Bruce was only barely to make that antidote. Any second lost, any distraction beyond what he had, would have had him under Ivy's control.

This story goes to those worlds where Bruce didn't make it, where Ivy gained full control. Whether it's the same world as the comic story, a different world, a different media from DC... Or a world of Marvel? Or Marvel merged with DC? Or something else...