Sorry to necro, but I was googling the Congress of Prague quite unsuccessfully.
I thought a compromise peace that sees a surviving Napoleonic France could have been a great starting point for a "Victoria II" mod.
Napoleon II would be on the throne by 1836, and Id just have to redraw a few boundaries...

This would be a scenario where the Continental powers decided to make peace and where Britain grudgingly accepted it despite not being entirely satisfied. Franco-British rivalry would thus persist, though Im thinking no more general war between 1813 and 1836, but plenty of opportunities for renewed conflict from there onwards.
Scenario would probably be called "Point de Divergence". Im open to other PODs around that date, but I need a viable balance of power in '36, so it cant be pre-1812, and I want a French Empire, so it cant be after Waterloo. I find victory in the 100 Days both cliché and unrealistic, hence Prague. Thoughts?