No battle at Waterloo, or the French win because the Prussians don't show up. Napoleon wins one more big victory on the scale of Austerlitz against Prussia, Britain, and Austria, but it is not enough to regain Germany. Napoleon is later defeated by a mostly Prussian / Russian / Austrian force with the Brits humiliated. Much more of France is actually under the control of the big winners when peace is drawn up. More looting and chaos in the countryside since there is no orderly entry into Paris and perhaps have the allies start antagonizing each other in the countryside for loot.
Russians get more of Poland, maybe even Galicia, because they cannot get stuff from France directly.
Prussia gets the Southern Netherlands, Arbitrarily starts grabbing stuff near Calais.
Austria grabs Alsace-Lorraine, more of Italy, possibly even stuff around the Rhone depending on how many long dead duchies the Austrians want to drag around.
Austrians grab more of Italy with more Hapsburg Duchies. Perhaps they do something stupid and annex Savoy.
Austrians start mucking about in Germany more against the German Princes / Kings that didn't jump Napoleon's ship fast enough.
Brits feel obligated to do something or lose all momentum and lose the balance of power. Maybe grab Calais itself, perhaps Corsica. Netherlands fall closer to British orbit since there is no Belgium attached.
Britain does something stupid in Spain that causes rifts. Not sure what.
Somehow give Sweden Finland and Norway, cause why not.
France is not invited.
Thats the best I can come up with off the top of my head.
