Heh, I've just remembered that there are at least two other villains called Harvest in the DCU already.

One was an antiheroine from Birds of Prey, who was a woman who was horribly murdered by some guys and then came back years later as a slasher film-type monster to murder those responsible one by one, and the other was a kind of gestalt-intelligence created from the people Poison Ivy fed to her plants in THAT Detective Comics story.