The title says all, first of all I know that the Napoleonic kingdom of austria probably would be as chaotic as Napoleonic Spain, but this would also weaken austria and force them to send some forces to help in the invasion of russia, no?
That's the plan, austria could fall into a civil war, this would weaken austria enought to stop them from declaring war on France every time a opportunity showed up
Even if NNapoleon still gets defeated as OTL, Austria would never fully recover
would he even leave AH a single country or dismantle it in a number of crowns (hungary, bohemia, austria) to give to his generals, with his son being the heir to the Empire at large ?
The only time I can see such a thing happening is in 1809 given a diifernt and more decisive French victory. Wagram was not near decisive enough. If the later Battle of Znaim was fought to a finish instead of ending with an armistice that might do it if a really decisive French victory is the result.
As Hecatee says the Empire might be broken up in a similar manner to the Holy Roman Empire. I can see the Habsburgs being trated in a similar manner to the Hohenzollerns and being left with Austria. Territories lie Galicia and parts of Bohemia go to the Duchy of Warsaw and Saxony. Other territories will be annexed by Bavara and the Kingdom of Italy/ We probabl get a couple of new kingdoms, Bohemia and Hungary maybe ruled by locals or either a Marshal or a member of the Bonaprte family
His son would be an odd candidate, since he would probably have taken over the French Empire itself when Bonaparte died. I would expect Marshall Ney to take over the rule of the Hapsburg empire. The other side of it would be that Bonaparte would turn it into a puppet state with the former Hapsburg emperor heading it. If his son did take over there would probably be civil war and therefore turning it into occupied zone part of Italy or the French Empire.The last solution would be it going to the Duchy of Warsaw, in which they would aid against Russia.