I really want to see Murat as king in Portugal because I wanna see how Napoleon might've given more parts of Europe to his commanders, not just his kin.
I think I remember reading in some tl where after a more decisive victory at the Battle of Wagram, Napoleon was seriously wounded by
Friederich Staps unlike in otl where he was intercepted before his assassination attempt. The French Army angered and out for blood conducts an investigation which implicates some members in the Austrian government which leads to Napoleon in anger destroying the Habsburg Empire.
He gives Galicia to the Grand Duchy of Warsaw, Forces Kaiser Franz to abdicate to his mentally disabled son Ferdinand who now rules the "Crown of Austria" which is just Austria and Bohemia. Hungary in ttl is given to Marshall Davoust: The Iron Marshall to rule.
Prussia now terrified of Napoleon works desperately to be on his good side.
If latter invades the Ottoman Empire and carves it with Russia we could see something unforgettable like Ney being king of Albania or something, it would be interesting certainly.
Kill Mahmoud II and you might have a Napoleonic Serbia/Greece depending on how it goes. Though if Napoleon embraces steamships earlier and focuses on using the Netherlands' harbors he might be able to have some control over the Mediterranean and once again re-invade Egypt.