Bismarck' Greater Germany

After Prussia defeated the Austrian Empire in the 7 Weeks War King Wilhelm and his generals wanted to march on Vienna and vanquish the Austrian Hapsburgs. Bismarck opposed the idea because he wanted Austria as a future ally to his Little Germany. In this alternative history Bismarck is forced to agree and the Austrian Empire is destroyed. Bismarck is forced to change his plans and creates a Greater Germany in 1867. What kind of alliance would Bismarck weave and what would be the fate of Germany and all of Europe?