Why no #0?

Justice League International has been canceled after 12 issues and a Annual, but unlike the other titles that are ending this week it isn't getting a issue #0. Why not? Where is Booster Gold origin in the new 52? Or Godiva? Or Fire and Ice? I see Captain Atom and the other three titles are getting a issue zero but not an Annual, is this why we don't get to learn about the JLI past before joining up?

Let me know how you feel.