I don't want to debate whether or not they could have, but I've been putting alot of thought into an Austrian run German empire. Germany would have definitely been bigger, alot bigger in terms of both population and size. Their population would have been the size of Russia or close to it, but I don't know if the Industrialization that allowed the German empire to devistate the allies of WWI would have happened, so IDK if they still would have lost WWI or not. What do you think?