A brief message from Wolfgang Meyer has announced the completion of the Croebern diorama. According to his own words (translated from German):
With the help of my wife and my friends Daniela and Patrick the Great diorama could be built over.
Currently I am working on the documentation of the project. The first exhibition will be in October at Markham (Germany). There will available a book about the project and a DVD."
You can see further details in the two websites of the project: Croebern-1813 and Geschichte in Miniaturen. I recommend to explore both websites in full, using a translating tool if you (like me) are not fluent in German.