Considering he’s the one who reimposed slavery after the early Republic was forced to abolish it, I really doubt that would happen.
Not necessarily, that was in the beginning of his reign when he had the funds and men and navy to do it and more importantly, Haiti was still somewhat intact and producing most of it's crops.
Here, Haiti has/is going through another civil war, the economy is very much in shambles and they're getting non existent trade thanks to many countries not recognizing them , so just establishing slavery at gunpoint wouldn't do much when everything is wrecked.
Not to mention, Napoleon has wizened up and settled down more with the peace, especially knowing the stress of decades of war, so instead of choosing a more forceful choice, the diplomatic and smart choice would definitely appeal to him more I think.
Finally, there's the fact the inhabitants simply wouldn't accept being forced into slavery again especially given many are veterans of the independence war and know French tactics, not to mention it would be hell for the French soldier being told he's going to some tropical hole and die due to malaria/heat/wild animals/angry guerrillas and somehow not expect him to mutiny, even on orders from the Emperor. Not to mention a country like Britain would love the chance to not only appear as a moral champion by denouncing France as hypocrites who spout the Napoleonic code as so advanced but still try to put a people under the chains again, and gain a pragmatic victory by funneling weapons to the Haitians and when the French are exhausted again, gain a potential ally and market on the region with a boiling hatred for the former French overlords.