User blog:TheB/The Monster of Hyperdeutschland - Is it Ever Possible?

I've recently become a lot more interested in German history and have have discovered a concept called "Hyperdeutschland," where the German states that joined together OTL also joined with Austria-Hungary. This would create a truly monstrous nation, with massive industrial potential. However, I doubt the Germans in this new empire would be happy with the mix of nationalities they had inherited. So questions -

1) How could this ever be achieved?

2) What consequences would it bring to the nationalities within the empire? Presumably many would be pretty pissed off.

3) There is no doubt that there would be a war after the formation of this. Possible outcomes?

4) Long term effects? What happens to all the "Germanic" nations who are probably trembling in their seats? Could this empire ever survive?