The Austrian Response
Though perhaps not fully agreeing on the theological details of the affair, the court at Vienna viewed the death of the much-despised Prussian minister as an act of divine fortune as his assassin did. Diplomatically, the strangely charismatic and flexable diplomat had served as a constant thorn in their side on matters of inter-German diplomacy; having masterfully grasped the reigns of and harnessed the rising popular sentiment towards German unification to Prussia's national advantage: pursuing further centralization and exploitation of the Zollverein customs union and its industrial resources in the Ruhr valley to establish commercial hegemony over the northern portions of the Confederation and undermine the rival forces of Scandinavian unity, culminating in his self-proclaimed diplomatic "masterstroke" at Gastein two years prior. With his almost supernatural ability to hold conflcting images to different parties; being perceived as a champion for all German peoples despite being a strong Hohenzollern dynastist, being able to push liberal policies while remaining a conservative and absolutist at heart to maintain the trust and acquiescence of both his King and parliament, there were many who'd worried that in the upcoming Confederation Diet the man would pull out another miracle and undermine Austria's millenium-long hegemony over the Germanies and the delicate balanced established by the illustrious Metternich yet further, despite the almost universal opposition among the powers-that-be within the ruling houses of the German states. As such news of the death was met with more than a few sighs of relief behind palace and chatue doors, despite the few spontanious shows of mourning by fervent German nationalist and Anti-semetic groups in the streets. With Prussia's policy position in a state of flux and the hegemony of the royal faction no longer a guranteed fact, for the first time since 1848 there seemed to be an opportunity to halt their rival's continious rising power... one which Austria was keen to take full advantage of.
Austrian forgein policy since that year of revolutions; when the young Emperor Franz Joseph inhierated an empire on the brink of disintegrating under the combined pressure of widespread internal revolts and external invasion by the radical rebels in the Italian penninsula, had largely been left to languish in favor of domestic iniatives directed towards stiching his patchwork of dynastic crownlands into a modern, centeralized state under his neo-absolutist ideal. While this had left Vienna diplomatically isolated; having been unwilling to take on the risk of supporting her former Russian ally during the Crimean Crisis and being obliged to borrow heavily to build up the nessicerily civil and physical infastructure to connect the dispirate regions of the Empire, by 1866 the policy investments were starting to show real dividends. Following the bungled and costly mobalization of the army during the Crimean Crisis had revealed the exact areas of weakness in the state-developed rail network, a decade of privatization had not only eased some pressure on the budget but provided a ready basis for an industrial and urban boom in the Danubian trading towns and was starting to spread into Bohemia. Politically, the declawing of the regional Diets that had begun with the repudiation of the liberal, Federalist March Constitution had reached a new zeneth under the Feburary Patent of 61; subverting the language and ideals of the liberal reforms to autocratic ends by forming a centeralized Imperial Parliament heavily weighted towards the (Mainly German and Conservative) landowners empowered to gurantee "equal protection to all subjects under the law"; a term which in practice meant overuling the ancient privlages of the local Diets and independent-minded nobility and preventing the bougious from trying to create reforms from "the bottom up" by establishing local policy. This had proven particularly effective in the former Kingdom of Hungary who, following the Crown's formal integration into Austria, had in the course of barely a decade and a half been stripped of virtually all their institutional power; their Constitution, ancient right to deny the Emperor his requests for funds if their preceding list of greivances weren't met, and their legal autonomy as a separate entity dominated by the local nobility, which had in the past been the main hinderence on royal authority. Thus, while federalism had regained some cultural force since the return of (highly limited) representative government, it had become a gift to be bestowed from above rather than demanded from below, and had been reframed from the democractizing cause of the intellectuals of 48 to a call for "traditional rights" by a consertive upper class; opening the door to Franz Joseph settling the ideological question for good under the guise of benevolant compromise. He was merely waiting for a moment of political prestige and international security to present an effective ultimatium to the Bohemians and Magyars... which humiliating and containing Prussia by moving the full might of the rest of the Germanies to threaten them would provide.
To create such a united front, however, Austria couldn't be seen as openly celebrating the death of their rival. The official statement of the court, however, retained a casually deniable warning to Whilhelm when it expressed "Our deepest sympathies to you in the lose of your trusted confidant and fellow guranteer of the ancient liberties of the German nations from forgein yolks. We most veimently denounce this and any action that imposes an unjust will on a sovergeins through naked resort to the gun", which was still easily interpretted posatively by pro-Bismarkian factions. Far more relevent however were the diplomatic cominiques exchanged with the local representatives of the major voting German states; particularly those of Saxony, Bavaria, and Hanover. In addition to possessing the most powerful armies outside the Great Powers within the Confederation, the monarchies of those three kingdoms were considered the most reliably anti-Prussian, having made up the "Three Kings Alliance" which had been the main voice for particularism\decenteralization during the crisis of the Frankfurt Parlament. In these messages, Vienna informed her potential allies of her intentions to vote for a mobalization of the Confederation armies against the "Brandenburger attacks on the legitiment international laws and impositions on the sovergein rights of your minor brother-nations, whom if you do not stand united against now may next turn their bayonets on your crowns" and ",,Guranteeinng the full support of His Imperial Majesty towards guranteeing your continued prosperity through whatever means are nessicery". Preliminary efforts were being made in case an actual mobalization became nessicery, they claimed, and it would be wise for them and their allies to do the same; though claiming that "given difficulties in the court, Whilhelm will no doubt see the wisdom in backing down without such a step being nessicery should we demonstrate our will."
And, in actuality, efforts were being made to organize the core military forces of the monarchy; an Imperial order being sent up to Bohemia to, now that the spring planting was over, to start gradually pulling in reservists to bring the corps up to a third strength and concentrate in Moravia to threaten the Prussian position in Silesia. In reality, this force served a duel purpose as described in a secondary, sealed order; to act as a a deterrent to potential Polish or Czech unrest once the Prussian inevitably backed down and his final plans for settling the status of the crownlands were presented to the local Diets, allowing for a quick crackdown in case of armed resistance before it could seriously organize.