What if he initiate a Southern Rebelion some 60 years earlier than OTL? Napoleon had been pro-slavery concerning his actions in Haiti.
Napoléon was not an abolitionist, but he was not particulary pro-slavery either. His goal was to enforce his (or France's) authority on the sugar islands. At the peace of Amiens, the British gave back Martinique they conquered on the French and in which slavery had never been abolished (in fact, the white planters surrendered the island to the British in order to keep the slavery system in place). In order to appease the planters, Napoléon gave assurance slavery would not be abolished in Martinique (act of may 1802). In the other french-held colonies (Guadeloupe, Guyane and Saint-Dominque), slavery was not to be re-established. Well, that was the plan, but with Haiti/Saint Domingue going its own way, the local administrations effectively re-established slavery everywhere, including former slavery-free islands, and Napoléon got along with confirming decrees (july and december 1802). The main issue with Haiti was not slavery, it was Toussaint Louverture assuming all powers without french overseeing.