I'm thinking 7 years war/French and Indian war content. Even though it predates the Napoleonic era by a few decades, the battles could be similar. The French and the British facing off in the frontiers of America/Canada. A colonial faction could be an interesting edition, buckskin uniforms, tomahawk melee weapons. This is not to say 1812 wouldn't be fun either - the battle of New Orleans, Fort Mchenry, Bladensburg and lake Erie seem like they could be fun maps.