There was once a crime before there were digitally implanted Tig Notaro and scores of zombies.Zack and Deborah Snyder shared a preview of their prequel to May’s Netflix zombie movie, Army of the Dead in a panel on Sunday. This trailer for Army of Thieves shows what looks a lot like a well-made, not-at all fantastical, heist movie. (Zombies are still around, we just don't want to be too focused on them.In other words, it's an expansion on the universe. Director Matthias Schweighfer, writer Shay Hatten and their exploration of the past give fans a deeper and better-defined world that can be used as a base for new stories.The panel recording at top explains how the whole thing came together, and includes a trailer at the end. Netflix has a trailer available on Twitter. Army of Thieves will be "coming soon."