http://andriasang.com/comyca/
The image, supposedly from a post card that comes with a Falcom drama CD, refers to the game as Legend of Heroes: Zero no Kiseki Full Voice Version and lists a release of Spring 2012. Details are promised at http://www.zero-full.com.
I don't have any way of verifying if the image is legit or not, so you should probably consider this a rumor for now.