The Secret Origin of John Blake in Batman Comics
Based on a press release, he was described as "a Gotham City beat cop assigned to special duty under the command of Commissioner Gordon."
Thanks to Badass Digest, it looks like John Blake has made an appearance in Batman lore before though -- albeit in a coloring book.
Still, it's a cool find.
Check it out below. (Click images for a new tab to zoom in and read.)